| Election Name: | 2018 United States Senate elections |
| Country: | United States |
| Flag Year: | 1960 |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2016 United States Senate elections |
| Previous Year: | 2016 |
| Election Date: | November 6, 2018 November 27 (Mississippi runoff) |
| Next Election: | 2020 United States Senate elections |
| Next Year: | 2020 |
| Seats For Election: | 35 of the 100 seats in the United States Senate |
| Majority Seats: | 51 |
| 1Blank: | Seats up |
| 2Blank: | Races won |
| Party1: | Republican Party (US) |
| Image1: | Mitch McConnell portrait 2016 (3x4a).jpg |
| Leader1: | Mitch McConnell |
| Leader Since1: | January 3, 2007 |
| Leaders Seat1: | Kentucky |
| Seats Before1: | 51 |
| Seats After1: | 53 |
| Seat Change1: | 2 |
| Popular Vote1: | 34,687,875 |
| Percentage1: | 38.7% |
| 1Data1: | 9 |
| 2Data1: | 11 |
| Party2: | Democratic Party (US) |
| Leader2: | Chuck Schumer |
| Leader Since2: | January 3, 2017 |
| Leaders Seat2: | New York |
| Seats Before2: | 47 |
| Seats After2: | 45 |
| Seat Change2: | 2 |
| Popular Vote2: | 52,224,867 |
| Percentage2: | 58.2% |
| 1Data2: | 24 |
| 2Data2: | 22 |
| Party4: | Independent (US) |
| Seats Before4: | 2 |
| Seats After4: | 2 |
| Popular Vote4: | 808,370 |
| Percentage4: | .9% |
| Outgoing Members: | 2017 (AL) |
| 1Data4: | 2 |
| 2Data4: | 2 |
| Map Size: | 320px |
| Majority Leader | |
| Before Election: | Mitch McConnell |
| Before Party: | Republican Party (US) |
| After Election: | Mitch McConnell |
| After Party: | Republican Party (US) |
The 2018 United States Senate elections were held on November 6, 2018. Among the 100 seats, the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi. The regular election winners were elected to 6-year terms running from January 3, 2019, to January 3, 2025. Senate Democrats had 26 seats up for election (including the seats of 2 Independents who caucus with them), while Senate Republicans had 9 seats up for election.
To maintain their working majority of 50 senators and their party's vice president's tie-breaking vote, Republicans could only afford a net loss of 1 seat in these elections. The Republicans had a 52–48 majority after the 2016 elections, but they lost a seat in Alabama after Jeff Sessions resigned to become U.S. attorney general and Doug Jones, a Democrat, won in the subsequent special election. 3 Republican-held seats were open as a result of retirements in Tennessee, Utah, and Arizona. Although every Democratic incumbent ran for re-election, Democrats faced an extremely unfavorable map, defending 26 seats, of which 10 were in states won by Donald Trump in the 2016 presidential election, and 5 of those where Trump had won by more than 10%. Republicans, however, only had to defend 9 seats, of which only 1 was in a state won by Hillary Clinton in 2016.
The Republicans increased their majority by defeating Democratic incumbents in Florida, Indiana, Missouri, and North Dakota, and holding the open seats in Tennessee and Utah. Democrats won 2 Republican-held seats, defeating an incumbent in Nevada and winning the open seat in Arizona. This was the first time Republicans gained Class 1 Senate seats since 1994.
The results for this election cycle were the only significant gains made by the Republicans in what was otherwise characterized as a "blue wave" election. The Republican gains in the Senate and the Democratic gains in the House marked the first midterm election cycle since 1970 in which the president's party made net gains in one chamber of Congress while suffering net losses in the other,[1] which also occurred in 1914, 1962, and 2022. This was also the first midterm election cycle since 2002 in which any incumbents of the non-presidential party lost re-election. The number of defeated non-presidential party incumbents (4) was the most since the 1934 mid-terms.[2] To date, this remains the last time that Democrats won a Senate election in Montana, Ohio, and West Virginia.
Among the 33 Class 1 Senate seats up for regular election in 2018, twenty-three were held by Democrats, two by independents who caucused with the Senate Democrats and eight by Republicans. Class Two seats in Minnesota and Mississippi held by interim appointees were also up for election; both incumbent appointees sought election to finish their unexpired terms.
Democrats targeted Republican-held Senate seats in Arizona (open seat) and Nevada. Seats in Texas,[3] Mississippi (at least one of the two seats) and Tennessee (open seat)[4] were also competitive for the Democrats. Republicans targeted Democratic-held seats in Indiana, Missouri, Montana, North Dakota and West Virginia, all of which were won by Republicans in both the 2012 and 2016 presidential elections.[5] Seats in Florida, Ohio, Pennsylvania, Wisconsin and Michigan, all of which were won by Obama in 2008 and 2012 but by Trump in 2016, were also targeted by Republicans.[6] [7] The Democratic-held seat in New Jersey was also considered unexpectedly competitive due to corruption allegations surrounding the Democratic incumbent.
The map was widely characterized as extremely unfavorable to Democrats, as Democrats were defending 26 states while Republicans were defending nine. Of these seats, Democrats were defending ten in states won by Donald Trump in the 2016 presidential election, while Republicans were only defending one seat in a state won by Hillary Clinton in 2016.[8] [9] [10] According to FiveThirtyEight, Democrats faced the most unfavorable Senate map in 2018 that any party has ever faced in any election.[11] [12]
| Parties | Total | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Democratic | Republican | Independent | Libertarian | Green | Other | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Last elections (2016) | 46 | 52 | 2 | 0 | 0 | 0 | 100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Before these elections | 47 | 51 | 2 | 0 | 0 | 0 | 100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Not up | 23 | 42 | 0 | — | — | — | 65 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 11 | 20 | 0 | — | — | — | 31 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 12 | 22 | 0 | — | — | — | 34 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Up | 24 | 9 | 2 | — | — | — | 35 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| < | -- Gap for "Up" (ALL the 2018 elections!)--> | 23 | 8 | 2 | — | — | — | 33 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | 1 | 0 | — | — | — | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Regular elections | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Incumbent retired | 0 | 3 | 0 | — | — | — | 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | 2 | — | — | — | — | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Republican replaced by 1 Democrat | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | 2 | 0 | 0 | 0 | 0 | 3 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Incumbent ran | 23 | 5 | 2 | — | — | — | 30 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 19 | 4 | 2 | — | — | — | 25 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 Republican replaced by 1 Democrat 4 Democrats replaced by 4 Republicans | 5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 20 | 8 | 2 | 0 | 0 | 0 | 30 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Special elections | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Appointee ran | 1 | 1 | — | — | — | — | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | 1 | — | — | — | — | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | 1 | 0 | 0 | 0 | 0 | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total elected | 22 | 11 | 2 | 0 | 0 | 0 | 35 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net gain/loss | 2 | 2 | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nationwide vote | 52,224,867 | 34,722,926 | 808,370 | 590,051 | 200,599 | 1,262,765 | 90,473,222 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share | 58.17% | 38.67% | 0.90% | 0.66% | 0.22% | 1.41% | 100% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Result | 45 | 53 | 2 | 0 | 0 | 0 | 100 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Source: Clerk of the U.S. House of Representatives.[13]
Each block represents one of the one hundred seats in the Senate. "D#" is a Democratic senator, "I#" is an independent senator and "R#" is a Republican senator. Arranged so parties are separated and a majority is clear by crossing the middle.
Each block indicates an incumbent senator's actions going into the election. Some "Ran" for re-election, some "Retired," and those without a note were not up for election this cycle. Before the elections, Republicans held 51 seats, Democrats held 47, and Independents held 2.
After the 2017 Senate special election in Alabama on the start of the second session in the 115th Congress.
| width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | |
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | D | D | I | I | R | |||||||||||
| Majority → | ||||||||||||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R |
Some senators were "Re-elected," some were a "Gain" in the seat from the other party (either by beating an incumbent or by winning an open seat), some were a "Hold" by the same party but with a different senator, and those without a note were not up for election this year.
After these elections, Democrats had 45 seats, independents had 2, and Republicans had 53.
| width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | width=10% | D | |
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | D | D | D | D | D | |||||||||||
| D | D | D | D | D | I | I | R | R | R | |||||||||||
| Majority → | ||||||||||||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R | |||||||||||
| R | R | R | R | R | R | R | R | R | R |
| Key: |
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|---|
Several sites and individuals publish predictions of competitive seats. These predictions look at factors such as the strength of the incumbent (if the incumbent is running for re-election) and the other candidates, and the state's partisan lean (reflected in part by the state's Cook Partisan Voting Index rating). The predictions assign ratings to each seat, indicating the predicted advantage that a party has in winning that seat.
Most election predictors used:
| Constituency | Incumbent | 2018 election ratings | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| State | PVI[14] | Senator | data-sort-type="number" | Last election | Cook [15] | IE [16] | Sabato [17] | NYT [18] | Fox News [19] | CNN [20] | RCP [21] | Daily Kos [22] | Politico [23] | 538 [24] | Result | ||||||||||||
| Arizona | data-sort-value="105" | R+5 | data-sort-value="Flake, Jeff" | Jeff Flake | data-sort-value="49.2" | 49.2% R | data-sort-value="-50.0" | Sinema 50.0% D | |||||||||||||||||||
| California | data-sort-value="-12" | D+12 | data-sort-value="Feinstein, Dianne" | Dianne Feinstein | data-sort-value="-62.5" | 62.5% D | data-sort-value="-54.2" | Feinstein 54.2% D | |||||||||||||||||||
| Connecticut | data-sort-value="-6" | D+6 | data-sort-value="Murphy, Chris" | Chris Murphy | data-sort-value="-54.8" | 54.8% D | data-sort-value="-59.5" | Murphy 59.5% D | |||||||||||||||||||
| Delaware | data-sort-value="-6" | D+6 | data-sort-value="Carper, Tom" | Tom Carper | data-sort-value="-66.4" | 66.4% D | data-sort-value="-60.0" | Carper 60.0% D | |||||||||||||||||||
| Florida | data-sort-value="102" | R+2 | data-sort-value="Nelson, Bill" | Bill Nelson | data-sort-value="-55.2" | 55.2% D | data-sort-value="50.1" | Scott 50.1% R | |||||||||||||||||||
| Hawaii | data-sort-value="-18" | D+18 | data-sort-value="Hirono, Mazie" | Mazie Hirono | data-sort-value="-62.6" | 62.6% D | data-sort-value="-71.2" | Hirono 71.2% D | |||||||||||||||||||
| Indiana | data-sort-value="109" | R+9 | data-sort-value="Donnelly, Joe" | Joe Donnelly | data-sort-value="-50.0" | 50.0% D | data-sort-value="50.7" | Braun 50.7% R | |||||||||||||||||||
| Maine | data-sort-value="-3" | D+3 | data-sort-value="King, Angus" | Angus King | data-sort-value="-52.9" | 52.9% I | < | --IE--> | < | --SCB--> | < | --NYT--> | < | --Fox--> | < | --CNN--> | < | --RCP--> | < | --DKE--> | < | --Pol--> | < | --538--> | data-sort-value="-54.3" | King 54.3% I | |
| Maryland | data-sort-value="-12" | D+12 | data-sort-value="Cardin, Ben" | Ben Cardin | data-sort-value="-56.0" | 56.0% D | data-sort-value="-64.9" | Cardin 64.9% D | |||||||||||||||||||
| Massachusetts | data-sort-value="-12" | D+12 | data-sort-value="Warren, Elizabeth" | Elizabeth Warren | data-sort-value="-53.7" | 53.7% D | data-sort-value="-60.3" | Warren 60.3% D | |||||||||||||||||||
| Michigan | data-sort-value="-1" | D+1 | data-sort-value="Stabenow, Debbie" | Debbie Stabenow | data-sort-value="-58.8" | 58.8% D | data-sort-value="-52.3" | Stabenow 52.3% D | |||||||||||||||||||
| Minnesota | data-sort-value="-1" | D+1 | data-sort-value="Klobuchar, Amy" | Amy Klobuchar | data-sort-value="-65.2" | 65.2% D | data-sort-value="-60.3" | Klobuchar 60.3% D | |||||||||||||||||||
| Minnesota | data-sort-value="-1" | D+1 | data-sort-value="Smith, Tina" | Tina Smith | data-sort-value="0" | Appointed | data-sort-value="-53.0" | Smith 53.0% D | |||||||||||||||||||
| Mississippi | data-sort-value="109" | R+9 | data-sort-value="Wicker, Roger" | Roger Wicker | data-sort-value="57.1" | 57.1% R | data-sort-value="58.5" | Wicker 58.5% R | |||||||||||||||||||
| Mississippi | data-sort-value="109" | R+9 | data-sort-value="Hyde-Smith, Cindy" | Cindy Hyde-Smith | data-sort-value="0" | Appointed | data-sort-value="53.6" | Hyde-Smith 53.6% R | |||||||||||||||||||
| Missouri | data-sort-value=109 | R+9 | data-sort-value="McCaskill, Claire" | Claire McCaskill | data-sort-value="-54.8" | 54.8% D | data-sort-value="51.4" | Hawley 51.4% R | |||||||||||||||||||
| Montana | data-sort-value=111 | R+11 | data-sort-value="Tester, Jon" | Jon Tester | data-sort-value="-48.6" | 48.6% D | data-sort-value="-50.3" | Tester 50.3% D | |||||||||||||||||||
| Nebraska | data-sort-value=114 | R+14 | data-sort-value="Fischer, Deb" | Deb Fischer | data-sort-value="57.8" | 57.8% R | data-sort-value="57.7" | Fischer 57.7% R | |||||||||||||||||||
| Nevada | data-sort-value=-1 | D+1 | data-sort-value="Heller, Dean" | Dean Heller | data-sort-value="45.9" | 45.9% R | data-sort-value="-50.4" | Rosen 50.4% D | |||||||||||||||||||
| New Jersey | data-sort-value=-7 | D+7 | data-sort-value="Menendez, Bob" | Bob Menendez | data-sort-value="-58.9" | 58.9% D | data-sort-value="-54.0" | Menendez 54.0% D | |||||||||||||||||||
| New Mexico | data-sort-value=-3 | D+3 | data-sort-value="Heinrich, Martin" | Martin Heinrich | data-sort-value="-51.0" | 51.0% D | data-sort-value="-54.1" | Heinrich 54.1% D | |||||||||||||||||||
| New York | data-sort-value=-11 | D+11 | data-sort-value="Gillibrand, Kirsten" | Kirsten Gillibrand | data-sort-value="-72.2" | 72.2% D | data-sort-value="-67.0" | Gillibrand 67.0% D | |||||||||||||||||||
| North Dakota | data-sort-value=116 | R+16 | data-sort-value="Heitkamp, Heidi" | Heidi Heitkamp | data-sort-value="-50.2" | 50.2% D | data-sort-value="55.4" | Cramer 55.4% R | |||||||||||||||||||
| Ohio | data-sort-value=103 | R+3 | data-sort-value="Brown, Sherrod" | Sherrod Brown | data-sort-value="-50.7" | 50.7% D | data-sort-value="-53.4" | Brown 53.4% D | |||||||||||||||||||
| Pennsylvania | data-sort-value=0 | EVEN | data-sort-vaue="Casey, Bob" | Bob Casey Jr. | data-sort-value="-53.7" | 53.7% D | data-sort-value="-55.7" | Casey 55.7% D | |||||||||||||||||||
| Rhode Island | data-sort-value=-10 | D+10 | data-sort-value="Whitehouse, Sheldon" | Sheldon Whitehouse | data-sort-value="-64.8" | 64.8% D | data-sort-value="-61.5" | Whitehouse 61.5% D | |||||||||||||||||||
| Tennessee | data-sort-value=114 | R+14 | data-sort-value="Corker, Bob" | Bob Corker | data-sort-value="64.9" | 64.9% R | data-sort-value="54.7" | Blackburn 54.7% R | |||||||||||||||||||
| Texas | data-sort-value=108 | R+8 | data-sort-value="Cruz, Ted" | Ted Cruz | data-sort-value="56.5" | 56.5% R | data-sort-value="50.9" | Cruz 50.9% R | |||||||||||||||||||
| Utah | data-sort-value=120 | R+20 | data-sort-value="Hatch, Orrin" | Orrin Hatch | data-sort-value="65.3" | 65.3% R | data-sort-value="62.6" | Romney 62.6% R | |||||||||||||||||||
| Vermont | data-sort-value=-15 | D+15 | data-sort-value="Sanders, Bernie" | Bernie Sanders | data-sort-value="-71.0" | 71.0% I | < | --IE--> | < | --SCB--> | < | --NYT--> | < | --Fox--> | < | --CNN--> | < | --RCP--> | < | --DKE--> | < | --Pol--> | < | --538--> | data-sort-value="-67.4" | Sanders 67.4% I | |
| Virginia | data-sort-value=-1 | D+1 | data-sort-value="Kaine, Tim" | Tim Kaine | data-sort-value="-52.3" | 52.3% D | data-sort-value="-57.0" | Kaine 57.0% D | |||||||||||||||||||
| Washington | data-sort-value=-7 | D+7 | data-sort-value="Cantwell, Maria" | Maria Cantwell | data-sort-value="-60.4" | 60.4% D | data-sort-value="-58.3" | Cantwell 58.3% D | |||||||||||||||||||
| West Virginia | data-sort-value=120 | R+20 | data-sort-value="Manchin, Joe" | Joe Manchin | data-sort-value="-60.6" | 60.6% D | data-sort-value="-49.6" | Manchin 49.6% D | |||||||||||||||||||
| Wisconsin | data-sort-value=0 | EVEN | data-sort-value="Baldwin, Tammy" | Tammy Baldwin | data-sort-value="-51.4" | 51.4% D | data-sort-value="-55.4" | Baldwin 55.4% D | |||||||||||||||||||
| Wyoming | data-sort-value=125 | R+25 | data-sort-value="Barrasso, John" | John Barrasso | data-sort-value="75.7" | 75.7% R | data-sort-value="67.0" | Barrasso 67.0% R | |||||||||||||||||||
| Overall< | --Coo--> | D - 43 R - 48 9 tossups | D - 48 R - 51 1 tossup | D - 48 R - 52 0 tossups | D - 43 R - 48 9 tossups | D - 45 R - 50 5 tossups | D - 45 R - 49 6 tossups | D - 43 R - 49 8 tossups | D - 44 R - 50 6 tossups | D - 45 R - 50 5 tossups | D - 48 R - 50 2 tossups | Results: D - 47 R - 53 | |||||||||||||||
These are the election dates for the regularly scheduled general elections.
| State | Filing deadline[25] | Primary election[26] | Primary run-off | General election | Poll closing [27] | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Arizona | data-sort-value="May 30, 2018" | May 30, 2018 | data-sort-value="August 28, 2018" | August 28, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| California | data-sort-value="March 9, 2018" | March 9, 2018 | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2300 | 11pm | |
| Connecticut | data-sort-value="June 12, 2018" | June 12, 2018 | data-sort-value="August 14, 2018" | August 14, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Delaware | data-sort-value="July 10, 2018" | July 10, 2018 | data-sort-value="September 6, 2018" | September 6, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Florida | data-sort-value="May 4, 2018" | May 4, 2018 | data-sort-value="August 28, 2018" style= | August 28, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1920 | 7pm and 8pm | |
| Hawaii | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="August 11, 2018" | August 11, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2300 | 11pm | |
| Indiana | data-sort-value="February 9, 2018" | February 9, 2018 | data-sort-value="May 8, 2018" | May 8, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1800 | 6pm and 7pm | |
| Maine | data-sort-value="March 15, 2018" | March 15, 2018 | data-sort-value="June 12, 2018" | June 12, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Maryland | data-sort-value="February 27, 2018" | February 27, 2018 | data-sort-value="June 26, 2018" | June 26, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Massachusetts | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="September 4, 2018" | September 4, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Michigan | data-sort-value="April 24, 2018" | April 24, 2018 | data-sort-value="August 7, 2018" | August 7, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2020 | 8pm and 9pm | |
| Minnesota | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="August 14, 2018" style= | August 14, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| Mississippi | data-sort-value="March 1, 2018" | March 1, 2018 | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="June 26, 2018" | June 26, 2018 | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Mississippi (special) | data-sort-value="March 26, 2018" | March 26, 2018 | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 27, 2018" | November 27, 2018 | data-sort-value=2100 | 8pm | |
| Missouri | data-sort-value="March 27, 2018" | March 27, 2018 | data-sort-value="August 7, 2018" | August 7, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Montana | data-sort-value="March 12, 2018" | March 12, 2018 | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2200 | 10pm | |
| Nebraska | data-sort-value="March 1, 2018" | March 1, 2018 | data-sort-value="May 15, 2018" | May 15, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| Nevada | data-sort-value="March 16, 2018" | March 16, 2018 | data-sort-value="June 12, 2018" | June 12, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2200 | 10pm | |
| New Jersey | data-sort-value="April 2, 2018" | April 2, 2018 | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| New Mexico | data-sort-value="March 13, 2018" | March 13, 2018 | data-sort-value="June 5, 2018" | June 5, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| New York | data-sort-value="April 12, 2018" | April 12, 2018 | data-sort-value="June 26, 2018" | June 26, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| North Dakota | data-sort-value="April 9, 2018" | April 9, 2018 | data-sort-value="June 12, 2018" | June 12, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2220 | 8pm and 9pm | |
| Ohio | data-sort-value="February 7, 2018" | February 7, 2018 | data-sort-value="May 8, 2018" | May 8, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1930 | 7:30pm | |
| Pennsylvania | data-sort-value="March 20, 2018" | March 20, 2018 | data-sort-value="May 15, 2018" | May 15, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Rhode Island | data-sort-value="June 27, 2018" | June 27, 2018 | data-sort-value="September 12, 2018" | September 12, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Tennessee | data-sort-value="April 5, 2018" | April 5, 2018 | data-sort-value="August 2, 2018" | August 2, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2000 | 8pm | |
| Texas | data-sort-value="December 11, 2017" | December 11, 2017 | data-sort-value="March 6, 2018" | March 6, 2018 | data-sort-value="May 22, 2018" | May 22, 2018 | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2020 | 8pm and 9pm | |
| Utah | data-sort-value="March 15, 2018" | March 15, 2018 | data-sort-value="June 26, 2018" | June 26, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2200 | 10pm | |
| Vermont | data-sort-value="May 31, 2018" | May 31, 2018 | data-sort-value="August 14, 2018" | August 14, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1900 | 7pm | |
| Virginia | data-sort-value="March 29, 2018" | March 29, 2018 | data-sort-value="June 12, 2018" | June 12, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1900 | 7pm | |
| Washington | data-sort-value="May 18, 2018" | May 18, 2018 | data-sort-value="August 7, 2018" | August 7, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2300 | 11pm | |
| West Virginia | data-sort-value="January 27, 2018" | January 27, 2018 | data-sort-value="May 8, 2018" | May 8, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=1930 | 7:30pm | |
| Wisconsin | data-sort-value="June 1, 2018" | June 1, 2018 | data-sort-value="August 14, 2018" | August 14, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm | |
| Wyoming | data-sort-value="June 1, 2018" | June 1, 2018 | data-sort-value="August 21, 2018" | August 21, 2018 | data-sort-value="December 31, 2018" | N/A | data-sort-value="November 6, 2018" | November 6, 2018 | data-sort-value=2100 | 9pm |
Three Republicans retired instead of seeking re-election.
Four Democrats and one Republican sought re-election but lost in the general election.
One Republican resigned before the start of the 116th Congress on December 31, 2018, and another Republican resigned during the 116th Congress for health reasons. Initially, all were replaced by Republican appointees.
In these special elections, the winners will be seated before January 3, 2019, when elected and qualified. They are ordered by election date, then by state and by class.
| State | Incumbent | Result | Candidates | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Senator | Party | Electoral history | |||||||
| Minnesota (Class 2) | data-sort-value="Smith, Tina" | Tina Smith | DFL | 2018 | Interim appointee elected. | nowrap | |||
| Mississippi (Class 2) | data-sort- value="Hyde-Smith, Cindy" | Cindy Hyde-Smith | Republican | 2018 | Interim appointee elected. | nowrap | |||
In these general elections, the winners were elected for the term beginning January 3, 2019.
All of the elections involve the Class 1 seats and they are ordered by state.
| State | Incumbent | Result | Candidates | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Senator | Party | Electoral history | |||||||
| Arizona | data-sort-value="Flake, Jeff" | Jeff Flake | Republican | 2012 | Incumbent retired. Democratic gain. | nowrap | |||
| California | data-sort-value="Feinstein, Dianne" | Dianne Feinstein | Democratic | 1992 1994 2000 2006 2012 | Incumbent re-elected. | nowrap | |||
| Connecticut | data-sort-value="Murphy, Chris" | Chris Murphy | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| Delaware | data-sort-value="Carper, Tom" | Tom Carper | Democratic | 2000 2006 2012 | Incumbent re-elected. | nowrap | |||
| Florida | data-sort-value="Nelson, Bill" | Bill Nelson | Democratic | 2000 2006 2012 | Incumbent lost re-election. Republican gain. Winner delayed term until January 8, 2019, to finish his term as Governor of Florida. | nowrap | |||
| Hawaii | data-sort-value="Hirono, Mazie" | Mazie Hirono | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| Indiana | data-sort-value="Donnelly, Joe" | Joe Donnelly | Democratic | 2012 | Incumbent lost re-election. Republican gain. | nowrap | |||
| Maine | data-sort-value="King, Angus" | Angus King | Independent | 2012 | Incumbent re-elected. | nowrap | |||
| Maryland | data-sort-value="Cardin, Ben" | Ben Cardin | Democratic | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Massachusetts | data-sort-value="Warren, Elizabeth" | Elizabeth Warren | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| Michigan | data-sort-value="Stabenow, Debbie" | Debbie Stabenow | Democratic | 2000 2006 2012 | Incumbent re-elected. | nowrap | |||
| Minnesota | data-sort-value="Klobuchar, Amy" | Amy Klobuchar | DFL | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Mississippi | data-sort-value="Wicker, Roger" | Roger Wicker | Republican | 2007 2008 2012 | Incumbent re-elected. | nowrap | |||
| Missouri | data-sort-value="McCaskill, Claire" | Claire McCaskill | Democratic | 2006 2012 | Incumbent lost re-election. Republican gain. | nowrap | |||
| Montana | data-sort-value="Tester, Jon" | Jon Tester | Democratic | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Nebraska | data-sort-value="Fischer, Deb" | Deb Fischer | Republican | 2012 | Incumbent re-elected. | nowrap | |||
| Nevada | data-sort-value="Heller, Dean" | Dean Heller | Republican | 2011 2012 | Incumbent lost re-election. Democratic gain. | nowrap | |||
| New Jersey | data-sort-value="Menendez, Bob" | Bob Menendez | Democratic | 2006 2006 2012 | Incumbent re-elected. | nowrap | |||
| New Mexico | data-sort-value="Heinrich, Martin" | Martin Heinrich | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| New York | data-sort-value="Gillibrand, Kirsten" | Kirsten Gillibrand | Democratic | 2009 2010 2012 | Incumbent re-elected. | nowrap | |||
| North Dakota | data-sort-value="Heitkamp, Heidi" | Heidi Heitkamp | Democratic-NPL | 2012 | Incumbent lost re-election. Republican gain. | nowrap | |||
| Ohio | data-sort-value="Brown, Sherrod" | Sherrod Brown | Democratic | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Pennsylvania | data-sort-value="Casey Bob" | Bob Casey Jr. | Democratic | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Rhode Island | data-sort-value="Whitehouse, Sheldon" | Sheldon Whitehouse | Democratic | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Tennessee | data-sort-value="Corker, Bob" | Bob Corker | Republican | 2006 2012 | Incumbent retired. Republican hold. | nowrap | |||
| Texas | data-sort-value="Cruz, Ted" | Ted Cruz | Republican | 2012 | Incumbent re-elected. | nowrap | |||
| Utah | data-sort-value="Hatch, Orrin" | Orrin Hatch | Republican | 1976 1982 1988 1994 2000 2006 2012 | Incumbent retired. Republican hold. | nowrap | |||
| Vermont | data-sort-value="Sanders, Bernie" | Bernie Sanders | Independent | 2006 2012 | Incumbent re-elected. | nowrap | |||
| Virginia | data-sort-value="Kaine, Tim" | Tim Kaine | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| Washington | data-sort-value="Cantwell, Maria" | Maria Cantwell | Democratic | 2000 2006 2012 | Incumbent re-elected. | nowrap | |||
| West Virginia | data-sort-value="Manchin, Joe" | Joe Manchin | Democratic | 2010 2012 | Incumbent re-elected. | nowrap | |||
| Wisconsin | data-sort-value="Baldwin, Tammy" | Tammy Baldwin | Democratic | 2012 | Incumbent re-elected. | nowrap | |||
| Wyoming | data-sort-value="Barrasso, John" | John Barrasso | Republican | 2007 2008 2012 | Incumbent re-elected. | nowrap | |||
In twelve races the margin of victory was under 10%.
| State | Party of winner | Margin | ||
|---|---|---|---|---|
| Florida | data-sort-value=.5 | Republican (flip) | 0.12% | |
| Arizona | data-sort-value=-0.5 | Democratic (flip) | 2.34% | |
| Texas | data-sort-value=1 | Republican | 2.57% | |
| West Virginia | data-sort-value=-1 | Democratic | 3.31% | |
| Montana | data-sort-value=-1 | Democratic | 3.55% | |
| Nevada | data-sort-value=-0.5 | Democratic (flip) | 5.03% | |
| Missouri | data-sort-value=0.5 | Republican (flip) | 5.81% | |
| Indiana | data-sort-value=0.5 | Republican (flip) | 5.89% | |
| Michigan | data-sort-value=-1 | Democratic | 6.51% | |
| Ohio | data-sort-value=-1 | Democratic | 6.85% | |
| Mississippi (special) | data-sort-value=1 | Republican | 7.27% | |
| California | data-sort-value=-1 | Democratic | 8.33% |
| Election Name: | Arizona election |
| Country: | Arizona |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Arizona |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Arizona |
| Next Year: | 2024 |
| Turnout: | 64.85% |
| Nominee1: | Kyrsten Sinema |
| Image1: | Kyrsten Sinema (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,191,100 |
| Percentage1: | 49.96% |
| Nominee2: | Martha McSally |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,135,200 |
| Percentage2: | 47.61% |
| Map Size: | 200px |
| U.S. senator | |
| Before Election: | Jeff Flake |
| Before Party: | Republican Party (US) |
| After Election: | Kyrsten Sinema |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Arizona.
See also: List of United States senators from Arizona.
One-term Republican Jeff Flake was elected with 49% of the vote in 2012. He chose not to run for re-election.[28]
U.S. Representative Martha McSally[29] won the Republican nomination in a three-way primary on August 28, 2018, against Joe Arpaio and Kelli Ward.
U.S. Representative Kyrsten Sinema[29] easily secured the Democratic nomination.
Sinema defeated McSally by a slim margin; her victory became official only after six days of counting ballots.
| Election Name: | California election |
| Country: | California |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in California |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in California |
| Next Year: | 2024 |
| Turnout: | 56.42% |
| Nominee1: | Dianne Feinstein |
| Image1: | Dianne Feinstein, official Senate photo 2.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 6,019,422 |
| Percentage1: | 54.16% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 5,093,942 |
| Percentage2: | 45.84% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in California.
See also: List of United States senators from California.
Four-term Democrat Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She ran for re-election and advanced to the general election after securing the top spot in the June 5 jungle primary.[30]
The June 5 primary ballot listed 32 candidates (Feinstein plus 31 challengers) in addition to 3 write-in candidates. There were 10 Democratic candidates, 11 Republican candidates, one Libertarian, one Peace and Freedom candidate, and 9 independent candidates. There was also a Green Party candidate who ran as a write-in.
President pro tempore of the California State Senate Kevin de León advanced to the general election for the right to challenge Feinstein after securing the second spot in the primary.[30]
The 11 Republican candidates who ran in the primary combined for 33.2% of the vote. The top Republican candidate, James P. Bradley, received 8.3% of the vote, which put him in 3rd place at 3.8% behind the second-place finisher, Kevin DeLeon.[31]
On November 6, Dianne Feinstein was elected to a fifth term, defeating Kevin de León.
| Election Name: | Connecticut election |
| Country: | Connecticut |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Connecticut |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Connecticut |
| Next Year: | 2024 |
| Turnout: | 63.58% |
| Nominee1: | Chris Murphy |
| Image1: | Chris Murphy, official portrait, 113th Congress (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 825,579 |
| Percentage1: | 59.53% |
| Nominee2: | Matthew Corey |
| Party2: | Republican Party (US) |
| Popular Vote2: | 545,717 |
| Percentage2: | 39.35% |
| Map Size: | 200px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Connecticut.
See also: List of United States senators from Connecticut.
One-term Democrat Chris Murphy was elected with 55% of the vote in 2012. He ran for re-election.[32]
Businessmen Matthew Corey[33] received the Republican nomination.
Chris Murphy was elected to a second term, winning nearly 60% of the vote.[34]
| Election Name: | Delaware election |
| Country: | Delaware |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Delaware |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Delaware |
| Next Year: | 2024 |
| Turnout: | 52.18% |
| Image1: | Tom Carper, official portrait, 112th Congress (cropped).jpg |
| Nominee1: | Tom Carper |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 217,385 |
| Percentage1: | 59.95% |
| Nominee2: | Rob Arlett |
| Party2: | Republican Party (US) |
| Popular Vote2: | 137,127 |
| Percentage2: | 37.81% |
| Map Size: | 200px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Delaware.
See also: List of United States senators from Delaware.
Three-term Democrat Tom Carper won re-election with 66% of the vote in 2012. He announced he was running for re-election during an interview on MSNBC on July 24, 2017.[35] He defeated Dover community activist Kerri Evelyn Harris for the Democratic nomination. Sussex County Councilman Robert Arlett won the Republican nomination.[35]
Tom Carper defeated Arlett, winning 60% of the vote.[36]
| Election Name: | Florida election |
| Country: | Florida |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Florida |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Florida |
| Next Year: | 2024 |
| Turnout: | 61.68% |
| Image1: | Official Portrait of Senator Rick Scott (R-FL).jpg |
| Nominee1: | Rick Scott |
| Party1: | Republican Party (US) |
| Popular Vote1: | 4,099,505 |
| Percentage1: | 50.05% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 4,089,472 |
| Percentage2: | 49.93% |
| Map Size: | 240px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Florida.
See also: List of United States senators from Florida.
Three-term Democrat Bill Nelson was re-elected with 55% of the vote in 2012. He sought re-election to a fourth term in office.[37]
Florida Governor Rick Scott won the Republican nomination. First elected in 2010 and re-elected in 2014, Scott's term as Governor of Florida was set to end by January 2019, due to term limits.[37]
Edward Janowski was running as an independent, but did not qualify.[37]
Scott led among ballots tallied on election night, but given the close margins of the race recounts were ordered.[38] Final recount numbers were released following a machine and hand recount with Rick Scott maintaining a lead.[39] On November 18, Nelson conceded to Scott.[40] Two days later, election results were certified by the state, cementing Scott's win.[41]
| Election Name: | Hawaii election |
| Country: | Hawaii |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Hawaii |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Hawaii |
| Next Year: | 2024 |
| Turnout: | 51.32% |
| Image1: | Mazie Hirono, official portrait, 113th Congress (cropped).jpg |
| Nominee1: | Mazie Hirono |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 276,316 |
| Percentage1: | 71.15% |
| Nominee2: | Ron Curtis |
| Party2: | Republican Party (US) |
| Popular Vote2: | 112,035 |
| Percentage2: | 28.85% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Hawaii.
See also: List of United States senators from Hawaii.
One-term Democrat Mazie Hirono was elected with 63% of the vote in 2012. She ran.[42]
Ron Curtis was the Republican nominee.
Hirono was elected to a second term by a landslide.
| Election Name: | Indiana election |
| Country: | Indiana |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Indiana |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Indiana |
| Next Year: | 2024 |
| Turnout: | 50.42% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 1,023,553 |
| Percentage2: | 44.84% |
| Nominee1: | Mike Braun |
| Image1: | Mike Braun, Official Portrait, 116th Congress.jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 1,158,000 |
| Percentage1: | 50.73% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Indiana.
See also: List of United States senators from Indiana.
One-term Democrat Joe Donnelly was elected with 50.04% of the vote in 2012. He ran. He won the Democratic primary unopposed.[43]
State Representative Mike Braun[43] won the May 8 Republican primary. U.S. Representatives Luke Messer[44] and Todd Rokita[44] also ran for the Republican nomination.
James Johnson ran as an independent.[43]
Braun won election with 51% of the vote, defeating Joe Donnelly.[45]
| Election Name: | Maine election |
| Country: | Maine |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Maine |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Maine |
| Next Year: | 2024 |
| Turnout: | 59.96% |
| Nominee1: | Angus King |
| Image1: | Angus King, official portrait, 113th Congress.jpg |
| Party1: | Independent politician |
| Popular Vote1: | 344,575 |
| Percentage1: | 54.31% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 223,502 |
| Percentage2: | 35.23% |
| Nominee3: | Zak Ringelstein |
| Image3: | Zak Ringelstein in Biddeford, Maine (cropped).jpg |
| Party3: | Democratic Party (US) |
| Popular Vote3: | 66,268 |
| Percentage3: | 10.45% |
| U.S. senator | |
| Before Party: | Independent politician |
| After Party: | Independent politician |
See main article: 2018 United States Senate election in Maine.
See also: List of United States senators from Maine.
One-term Independent Senator Angus King was elected in a three-way race with 53% of the vote in 2012. King has caucused with the Democratic Party since taking office in 2013, but he has left open the possibility of caucusing with the Republican Party in the future.[46]
State Senator Eric Brakey ran unopposed for the Republican nomination.[47]
Public school teacher and founder of UClass Zak Ringelstein ran unopposed for the Democratic nomination.[47]
The election was conducted with ranked choice voting, as opposed to "First-past-the-post voting", after Maine voters passed a citizen referendum approving the change in 2016[48] and a June 2018 referendum sustaining the change.[49]
King was easily re-elected with over 50% of the vote.
See main article: 2018 United States Senate election in Maryland.
See also: List of United States senators from Maryland.
| Election Name: | Maryland election |
| Country: | Maryland |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Maryland |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Maryland |
| Next Year: | 2024 |
| Turnout: | 58.17% |
| Nominee1: | Ben Cardin |
| Image1: | Ben Cardin official Senate portrait.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,491,614 |
| Percentage1: | 64.86% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 697,107 |
| Percentage2: | 30.31% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
Two-term Democrat Ben Cardin was re-elected with 56% of the vote in 2012. He won the Democratic primary.[50]
Tony Campbell, Evan Cronhardt, Nnabu Eze, Gerald Smith, and Blaine Taylor[51] were seeking the Republican nomination, with Campbell winning.
Arvin Vohra, vice chairman of the Libertarian National Committee, sought the Libertarian Party nomination.[51]
Independents Neal Simon[51] and Edward Shlikas, and Michael B Puskar ran.
Cardin won re-election to a third term in office.[52]
| Election Name: | Massachusetts election |
| Country: | Massachusetts |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Massachusetts |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Massachusetts |
| Next Year: | 2024 |
| Turnout: | 59.17% |
| Nominee1: | Elizabeth Warren |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,633,371 |
| Percentage1: | 60.34% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 979,210 |
| Percentage2: | 36.17% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Massachusetts.
See also: List of United States senators from Massachusetts.
One-term Democrat Elizabeth Warren was elected with 54% of the vote in 2012. She ran for re-election.[53]
State Representative Geoff Diehl,[54] attorney and founder of Better for America, John Kingston[54] and former Romney aide Beth Lindstrom,[54] ran for the Republican nomination. Diehl won the Republican nomination.
Shiva Ayyadurai[55] ran as an independent. Shiva started as in early 2017 as the first Republican in the race, but went independent in November 2017.
Warren defeated Diehl, winning a second term.[56]
| Election Name: | Michigan election |
| Country: | Michigan |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Michigan |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Michigan |
| Next Year: | 2024 |
| Turnout: | 56.72% |
| Nominee1: | Debbie Stabenow |
| Image1: | Debbie Stabenow, official photo, 116th Congress (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 2,214,478 |
| Percentage1: | 52.26% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,938,818 |
| Percentage2: | 45.76% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Michigan.
See also: List of United States senators from Michigan.
Three-term Democrat Debbie Stabenow was re-elected with 59% of the vote in 2012.[57] She was renominated without Democratic opposition. On the Republican side, businessman John James won the nomination.[57]
In the final months of the election, polls showed the race was beginning to narrow. Ultimately, Stabenow was re-elected, defeating James, with a majority of the vote.
| Election Name: | Minnesota general election |
| Country: | Minnesota |
| Flag Year: | 1983 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Minnesota |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Minnesota |
| Next Year: | 2024 |
| Turnout: | 63.89% |
| Nominee1: | Amy Klobuchar |
| Image1: | Amy Klobuchar, official portrait, 113th Congress (cropped 2).jpg |
| Party1: | Minnesota Democratic–Farmer–Labor Party |
| Popular Vote1: | 1,566,174 |
| Percentage1: | 60.31% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 940,437 |
| Percentage2: | 36.21% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Minnesota Democratic–Farmer–Labor Party |
| After Party: | Minnesota Democratic–Farmer–Labor Party |
See main article: 2018 United States Senate election in Minnesota.
See also: List of United States senators from Minnesota and 2018 United States Senate special election in Minnesota.
Two-term Democrat Amy Klobuchar was re-elected with 65% of the vote in 2012. She ran for re-election.[58]
State Representative Jim Newberger[58] ran for the Republican nomination.
Klobuchar was easily re-elected.[59]
| Election Name: | Minnesota special election |
| Country: | Minnesota |
| Flag Year: | 1983 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2014 United States Senate election in Minnesota |
| Previous Year: | 2014 |
| Next Election: | 2020 United States Senate election in Minnesota |
| Next Year: | 2020 |
| Turnout: | 63.66% |
| Nominee1: | Tina Smith |
| Image1: | Tina Smith official photo (cropped).jpg |
| Party1: | Minnesota Democratic–Farmer–Labor Party |
| Popular Vote1: | 1,370,540 |
| Percentage1: | 52.97% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,095,777 |
| Percentage2: | 42.35% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Minnesota Democratic–Farmer–Labor Party |
| After Party: | Minnesota Democratic–Farmer–Labor Party |
See main article: 2018 United States Senate special election in Minnesota.
See also: List of United States senators from Minnesota and 2018 United States Senate election in Minnesota.
Two-term Democrat Al Franken announced that he would resign in December 2017, following allegations of sexual harassment. Mark Dayton, Governor of Minnesota, appointed Lt. Gov. Tina Smith on January 2, 2018, as an interim Senator until the November 2018 election. She defeated primary challenger Richard Painter in the Democratic primary held on August 14.
Incumbent Tina Smith defeated Republican Karin Housley in the general election to finish the term ending January 3, 2021.
| Election Name: | Mississippi general election |
| Country: | Mississippi |
| Flag Image: | Flag of Mississippi (2001–2020).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Mississippi |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Mississippi |
| Next Year: | 2024 |
| Turnout: | 49.66% |
| Nominee1: | Roger Wicker |
| Image1: | Roger F. Wicker crop.jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 547,619 |
| Percentage1: | 58.49% |
| Nominee2: | David Baria |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 369,567 |
| Percentage2: | 39.47% |
| Map Size: | 250px |
| U.S. senator | |
| Before Election: | Roger Wicker |
| Before Party: | Republican Party (US) |
| After Election: | Roger Wicker |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Mississippi.
See also: List of United States senators from Mississippi and 2018 United States Senate special election in Mississippi.
One-term Republican Roger Wicker won re-election with 57% of the vote in 2012. He was appointed in 2007 and won a special election in 2008 to serve the remainder of Trent Lott's term.[60]
David Baria[60] won the Democratic nomination in a run-off on June 26.
Wicker was easily re-elected.[61]
| Election Name: | 2018 United States Senate special election in Mississippi |
| Country: | Mississippi |
| Flag Image: | Flag of Mississippi (2001–2020).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2014 United States Senate election in Mississippi |
| Previous Year: | 2014 |
| Next Election: | 2020 United States Senate election in Mississippi |
| Next Year: | 2020 |
| Election Date: | November 6, 2018 (first round) November 27, 2018 (runoff) |
| Turnout: | 48.14% |
| 1Blank: | First round |
| 2Blank: | Runoff |
| Candidate1: | Cindy Hyde-Smith |
| Party1: | Republican Party (United States) |
| 1Data1: | 389,995 41.2% |
| 2Data1: | 486,769 53.6% |
| Candidate2: | Mike Espy |
| Party2: | Democratic Party (United States) |
| 1Data2: | 386,742 40.9% |
| 2Data2: | 420,819 46.4% |
| Candidate3: | Chris McDaniel |
| Party3: | Republican Party (United States) |
| 1Data3: | 154,878 16.4% |
| 2Data3: | Eliminated |
| Map Size: | 200px |
| U.S. Senator | |
| Before Election: | Cindy Hyde-Smith |
| Before Party: | Republican Party (United States) |
| After Election: | Cindy Hyde-Smith |
| After Party: | Republican Party (United States) |
See main article: 2018 United States Senate special election in Mississippi.
See also: List of United States senators from Mississippi and 2018 United States Senate election in Mississippi.
Seven-term Republican Thad Cochran, who won re-election with 59.9% of the vote in 2014, announced that he would resign since April 1, 2018 for health reasons.[62] Phil Bryant, Governor of Mississippi, announced on March 21, 2018, that he would appoint Mississippi Agriculture Commissioner Cindy Hyde-Smith to fill the vacancy.[63] She ran in the special election.[60]
On November 6, a nonpartisan jungle primary took place on the same day as the regularly scheduled U.S. Senate election for the seat currently held by Roger Wicker. Party affiliations were not printed on the ballot.[64] As no candidate gained 50% of the votes, a runoff special election between the top two candidates - Hyde-Smith and former United States Secretary of Agriculture Mike Espy[60] - was held on November 27, 2018. Hyde-Smith won the runoff election.
Democrat Tobey Bartee[65] and Republican Chris McDaniel also contested the first round of the election.[60]
| Election Name: | Missouri election |
| Country: | Missouri |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Missouri |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Missouri |
| Next Year: | 2024 |
| Turnout: | 58.23% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 1,112,935 |
| Percentage2: | 45.57% |
| Nominee1: | Josh Hawley |
| Image1: | Josh Hawley, official portrait, 116th congress.jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 1,254,927 |
| Percentage1: | 51.38% |
| Map Size: | 255px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Missouri.
See also: List of United States senators from Missouri.
Two-term Democrat Claire McCaskill was re-elected with 55% of the vote in 2012. She was renominated.[66]
Attorney General Josh Hawley[66] won the Republican nomination.[67] Japheth Campbell declared his candidacy for the Libertarian nomination.[66]
Polls showed a close race for months leading up to the election. Hawley defeated McCaskill in the general election.[68]
| Election Name: | Montana election |
| Country: | Montana |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Montana |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Montana |
| Next Year: | 2024 |
| Turnout: | 70.86% |
| Nominee1: | Jon Tester |
| Image1: | JonTester (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 253,876 |
| Percentage1: | 50.33% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 235,963 |
| Percentage2: | 46.78% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Montana.
See also: List of United States senators from Montana.
Two-term Democrat Jon Tester was re-elected with 49% of the vote in 2012. He won the Democratic nomination in the June 5 primary with no opposition.[69]
State Auditor Matthew Rosendale[69] won the Republican nomination in the June 5 primary. State Senator Albert Olszewski,[69] former judge Russell Fagg,[69] and Troy Downing[69] also ran for the Republican nomination.
Tester was re-elected winning over 50% of the vote.[70]
| Election Name: | Nebraska election |
| Country: | Nebraska |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Nebraska |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Nebraska |
| Next Year: | 2024 |
| Turnout: | 57.32% |
| Nominee1: | Deb Fischer |
| Image1: | Deb Fischer, official portrait, 115th Congress (cropped).jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 403,151 |
| Percentage1: | 57.69% |
| Nominee2: | Jane Raybould |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 269,917 |
| Percentage2: | 38.62% |
| Map Size: | 300px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Nebraska.
See also: List of United States senators from Nebraska.
One-term Republican Deb Fischer was elected with 58% of the vote in 2012. She ran for and won the Republican nomination in the May 15 primary.[71] Other Republicans who ran include retired professor Jack Heidel, Todd Watson, and Dennis Frank Macek.[72]
Lincoln City Councilwoman Jane Raybould ran for and won the Democratic nomination in the May 15 primary.[71] Other Democrats who ran include Frank Svoboda, Chris Janicek, and Larry Marvin, who was a candidate in 2008, 2012, and 2014.[72]
Jim Schultz ran for the Libertarian nomination.[71]
Fischer was easily re-elected.[73]
| Election Name: | Nevada election |
| Country: | Nevada |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Nevada |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Nevada |
| Next Year: | 2024 |
| Turnout: | 62.26% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 441,202 |
| Percentage2: | 45.38% |
| Nominee1: | Jacky Rosen |
| Image1: | Jacky Rosen, official portrait, 116th congress (cropped-1).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 490,071 |
| Percentage1: | 50.41% |
| Map Size: | 200px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Nevada.
See also: List of United States senators from Nevada.
Incumbent Republican Dean Heller was the Republican nominee. He was appointed to the seat in 2011 and then elected with 46% of the vote in 2012. Heller considered running for governor, but chose to seek re-election.[74]
Nevada was the only state in the mid-term elections that had an incumbent Republican senator in a state that Hillary Clinton had won in 2016.
Representative Jacky Rosen[74] is the Democratic nominee.[75]
Rosen defeated Heller in the general election, making Heller the only Republican incumbent to lose re-election in 2018.[76]
| Election Name: | New Jersey election |
| Country: | New Jersey |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in New Jersey |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in New Jersey |
| Next Year: | 2024 |
| Turnout: | 53.38% |
| Nominee1: | Bob Menendez |
| Image1: | Robert Menendez official Senate portrait.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,711,654 |
| Percentage1: | 54.01% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,357,355 |
| Percentage2: | 42.83% |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in New Jersey.
See also: List of United States senators from New Jersey.
Republican Bob Hugin was nominated to face two-term Democrat Bob Menendez, who was re-elected with 59% of the vote in 2012. Menendez was originally appointed to the seat in January 2006. He ran for re-election, despite recent scandals that plagued his campaign.[77]
Hugin self-funded most of his campaign. Ultimately, Menendez was re-elected with nearly 54% of the vote.[78]
| Election Name: | New Mexico election |
| Country: | New Mexico |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in New Mexico |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in New Mexico |
| Next Year: | 2024 |
| Turnout: | 55.03% |
| Image1: | Heinrich Official Headshot 2019 (cropped).jpg |
| Nominee1: | Martin Heinrich |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 376,998 |
| Percentage1: | 54.09% |
| Image3: | Gary Johnson campaign portrait.jpg |
| Party3: | Libertarian Party (US) |
| Popular Vote3: | 107,201 |
| Percentage3: | 15.38% |
| Nominee2: | Mick Rich |
| Party2: | Republican Party (US) |
| Popular Vote2: | 212,813 |
| Percentage2: | 30.53% |
| Map Size: | 200px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in New Mexico.
See also: List of United States senators from New Mexico.
One-term Democrat Martin Heinrich was elected with 51% of the vote in 2012. He ran.[79] Mick Rich won the Republican nomination unopposed.[79]
Aubrey Dunn Jr., New Mexico Commissioner of Public Lands and otherwise the first Libertarian to ever hold statewide elected office in history, announced his run for the seat,[79] but stepped aside in August to allow former Governor of New Mexico, Gary Johnson's candidacy.
Heinrich was easily re-elected, defeating Rich and Johnson.
| Election Name: | New York election |
| Country: | New York |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in New York |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in New York |
| Next Year: | 2024 |
| Turnout: | 52.32% |
| Nominee1: | Kirsten Gillibrand |
| Image1: | Kirsten Gillibrand, official photo, 116th Congress (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 4,056,931 |
| Percentage1: | 67.00% |
| Nominee2: | Chele Chiavacci Farley |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,998,220 |
| Percentage2: | 33.00% |
| Map Size: | 300px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in New York.
See also: List of United States senators from New York.
One-term Democrat Kirsten Gillibrand was elected with 72% of the vote in 2012. She had previously been appointed to the seat in 2009 and won a special election to remain in office in 2010. She ran.[80]
Private equity executive Chele Chiavacci Farley has been nominated for U.S. Senate by the Republican and Conservative Parties.[80]
Gillibrand was elected to a second term.[81]
| Election Name: | North Dakota election |
| Country: | North Dakota |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in North Dakota |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in North Dakota |
| Next Year: | 2024 |
| Turnout: | 56.27% |
| Nominee2: | Heidi Heitkamp |
| Party2: | North Dakota Democratic-NPL Party |
| Popular Vote2: | 144,376 |
| Percentage2: | 44.55% |
| Nominee1: | Kevin Cramer |
| Image1: | File:Kevin Cramer, official portrait, 116th congress (cropped).jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 179,720 |
| Percentage1: | 55.45% |
| Map Size: | 250px |
| U.S. senator | |
| Before Election: | Heidi Heitkamp |
| Before Party: | North Dakota Democratic-NPL Party |
| After Election: | Kevin Cramer |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in North Dakota.
See also: List of United States senators from North Dakota.
One-term Democrat Heidi Heitkamp was elected with 50% of the vote in 2012. She won the Democratic nomination unopposed.[82]
Representative Kevin Cramer[82] won the Republican nomination in the June 12 primary. Former Niagara, North Dakota Mayor Thomas O'Neill[82] also ran for the Republican nomination.
Heitkamp was continuously behind in the polls leading up to the election, and Heitkamp ended up losing to Cramer by 11%.[83]
| Election Name: | Ohio election |
| Country: | Ohio |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Ohio |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Ohio |
| Next Year: | 2024 |
| Turnout: | 54.65% |
| Nominee1: | Sherrod Brown |
| Image1: | File:Sherrod Brown 117th Congress (2) (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 2,355,924 |
| Percentage1: | 53.41% |
| Nominee2: | Jim Renacci |
| Party2: | Republican Party (US) |
| Popular Vote2: | 2,053,963 |
| Percentage2: | 46.59% |
| Map Size: | 200px |
| U.S. senator | |
| Before Election: | Sherrod Brown |
| Before Party: | Democratic Party (US) |
| After Election: | Sherrod Brown |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Ohio.
See also: List of United States senators from Ohio.
Two-term Democrat Sherrod Brown was re-elected with 51% of the vote in 2012. He ran and was unopposed in Democratic primary.[84]
U.S. Representative Jim Renacci ran for and won the Republican nomination in the May 8 primary.[84] Other Republicans who ran include investment banker Michael Gibbons,[84] businesswoman Melissa Ackison,[84] Dan Kiley,[84] and Don Elijah Eckhart.[84]
Brown won re-election, defeating Renacci. Brown was the only non-judicial statewide Democrat in Ohio to win in 2018.[85]
| Election Name: | Pennsylvania election |
| Country: | Pennsylvania |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Pennsylvania |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Pennsylvania |
| Next Year: | 2024 |
| Turnout: | 58.18% |
| Nominee1: | Bob Casey Jr. |
| Image1: | Bob Casey Jr. official photo.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 2,792,327 |
| Percentage1: | 55.74% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 2,134,848 |
| Percentage2: | 42.62% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Pennsylvania.
See also: List of United States senators from Pennsylvania.
Two-term Democrat Bob Casey Jr. was re-elected with 54% of the vote in 2012. He ran and won the Democratic primary unopposed.[86]
U.S. Representative Lou Barletta ran for and won the Republican nomination in the May 15 primary.[86] Jim Christiana also ran for the Republican nomination.[86]
Casey was easily re-elected.[87]
| Election Name: | Rhode Island election |
| Country: | Rhode Island |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Rhode Island |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Rhode Island |
| Next Year: | 2024 |
| Turnout: | 47.69% |
| Image1: | Sheldon Whitehouse, official portrait, 116th congress.jpg |
| Nominee1: | Sheldon Whitehouse |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 231,477 |
| Percentage1: | 61.44% |
| Nominee2: | Robert Flanders |
| Party2: | Republican Party (US) |
| Popular Vote2: | 144,421 |
| Percentage2: | 38.33% |
| Map Size: | 230px |
| U.S. senator | |
| Before Election: | Sheldon Whitehouse |
| Before Party: | Democratic Party (US) |
| After Election: | Sheldon Whitehouse |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Rhode Island.
See also: List of United States senators from Rhode Island.
Two-term Democrat Sheldon Whitehouse was re-elected with 64% of the vote in 2012. He ran.[88]
Former Rhode Island Supreme Court Associate Justice Robert Flanders[88] was the Republican nominee.
Whitehouse was elected to a third term by a wide margin.
| Election Name: | Tennessee election |
| Country: | Tennessee |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Tennessee |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Tennessee |
| Next Year: | 2024 |
| Election Date: | November 6, 2018 |
| Turnout: | 54.46% [89] 7.4 pp |
| Image1: | File:Sen. Marsha Blackburn (R-TN) official headshot - 116th Congress (cropped).jpg |
| Nominee1: | Marsha Blackburn |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 1,227,483 |
| Percentage1: | 54.71% |
| Nominee2: | Phil Bredesen |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 985,450 |
| Percentage2: | 43.92% |
| Map Size: | 300px |
| U.S. Senator | |
| Before Election: | Bob Corker |
| Before Party: | Republican Party (United States) |
| After Election: | Marsha Blackburn |
| After Party: | Republican Party (United States) |
See main article: 2018 United States Senate election in Tennessee.
See also: List of United States senators from Tennessee.
Two-term Republican Bob Corker was re-elected with 65% of the vote in 2012. Senator Corker filed his Statement of Candidacy with the Secretary of the U.S. Senate to run for re-election,[90] but on September 26, 2017, Senator Corker announced his intent to retire.[91]
Aaron Pettigrew[92] and Republican U.S. Representative Marsha Blackburn[92] ran for the Republican nomination. Marsha Blackburn became the Republican nominee.
Former Tennessee Governor Phil Bredesen[92] became the Democratic nominee.
| Election Name: | Texas election |
| Country: | Texas |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Texas |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Texas |
| Next Year: | 2024 |
| Election Date: | November 6, 2018 |
| Turnout: | 53.01% (of registered voters) 42.07% (of voting age population)[93] |
| Image1: | File:Ted Cruz official 116th portrait (cropped).jpg |
| Nominee1: | Ted Cruz |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 4,260,553 |
| Percentage1: | 50.89% |
| Nominee2: | Beto O'Rourke |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 4,045,632 |
| Percentage2: | 48.33% |
| U.S. Senator | |
| Before Election: | Ted Cruz |
| Before Party: | Republican Party (United States) |
| After Election: | Ted Cruz |
| After Party: | Republican Party (United States) |
See main article: 2018 United States Senate election in Texas.
See also: List of United States senators from Texas.
One-term Republican Ted Cruz was elected with 57% of the vote in 2012. He overwhelmingly won the Republican primary on March 6, 2018.[94] Television producer Bruce Jacobson,[95] Houston energy attorney Stefano de Stefano,[96] former mayor of La Marque Geraldine Sam,[97] Mary Miller,[98] and Thomas Dillingham[99] were Cruz's opponents.
U.S. Representative Beto O'Rourke won the Democratic nomination on March 6, 2018.[94] Other Democrats who ran include Irasema Ramirez Hernandez[100] and Edward Kimbrough.[101]
Nurse Carl Bible ran as an independent.[102] Bob McNeil ran as the candidate of the American Citizen Party.[103] Neal Dikeman was the Libertarian nominee.[104]
O'Rourke ran a strong campaign, creating a close race in what has traditionally been a Republican stronghold.[105] Nevertheless, Cruz was narrowly re-elected to a second term.[106]
| Election Name: | Utah election |
| Country: | Utah |
| Flag Year: | 2011 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Utah |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Utah |
| Next Year: | 2024 |
| Turnout: | 74.15% |
| Nominee1: | Mitt Romney |
| Image1: | Mitt Romney official US Senate portrait (cropped).jpg |
| Party1: | Republican Party (US) |
| Popular Vote1: | 665,215 |
| Percentage1: | 62.59% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 328,541 |
| Percentage2: | 30.91% |
| Map Size: | 200px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Utah.
See also: List of United States senators from Utah.
Seven-term Republican Orrin Hatch was re-elected with 65% of the vote in 2012. Hatch was the President pro tempore of the United States Senate, as well as the second most-senior Senator. Before the 2012 election, Hatch said that he would retire at the end of his seventh term if he was re-elected.[107] Hatch initially announced his re-election campaign on March 9, 2017,[108] [109] but later announced his plans to retire on January 2, 2018. Former 2012 Republican presidential nominee Mitt Romney was running for the seat.[110]
Professor James Singer was running for the Democratic nomination, but he dropped out and endorsed Salt Lake County Councilwoman Jenny Wilson, who made her Senate bid official on July 17, 2017.[111] [112] Danny Drew[113] [114] also was running, but dropped out and endorsed Jenny Wilson. Mitchell Kent Vice was defeated for the Democratic nomination by Wilson.
Mitt Romney was easily elected, defeating Wilson.[115]
| Election Name: | Vermont election |
| Country: | Vermont |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Vermont |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Vermont |
| Next Year: | 2024 |
| Turnout: | 55.57% |
| Nominee1: | Bernie Sanders |
| Image1: | Bernie Sanders in March 2020 (cropped).jpg |
| Party1: | Independent politician |
| Popular Vote1: | 183,649 |
| Percentage1: | 67.44% |
| Nominee2: | Lawrence Zupan |
| Party2: | Republican Party (US) |
| Popular Vote2: | 74,815 |
| Percentage2: | 27.47% |
| Map Size: | 220px |
| Before Party: | Independent politician |
| After Party: | Independent politician |
See main article: 2018 United States Senate election in Vermont.
See also: List of United States senators from Vermont.
Two-term Independent Senator Bernie Sanders was re-elected with 71% of the vote in 2012. Sanders, one of two independent members of Congress, has caucused with the Democratic Party since taking office in 2007. In November 2015, Sanders announced his plans to run as a Democrat, rather than an independent, in all future elections. He won the nomination easily.[116]
Sanders easily won election to a third term.[117]
| Election Name: | Virginia election |
| Country: | Virginia |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Virginia |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Virginia |
| Next Year: | 2024 |
| Turnout: | 59.14% |
| Nominee1: | Tim Kaine |
| Image1: | Tim Kaine 116th official portrait.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,910,370 |
| Percentage1: | 57.00% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,374,313 |
| Percentage2: | 41.00% |
| Map Size: | 300px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Virginia.
See also: List of United States senators from Virginia.
One-term Democrat Tim Kaine was elected with 53% of the vote in 2012. He was re-nominated unopposed.[118] Prince William County Supervisor Corey Stewart[118] was the Republican nominee. Matt Waters was the Libertarian nominee.[119] Kaine defeated Stewart with 57% of the vote. Stewart received 41% of the vote.[120]
| Election Name: | Washington election |
| Country: | Washington |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Washington |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Washington |
| Next Year: | 2024 |
| Turnout: | 70.74% |
| Nominee1: | Maria Cantwell |
| Image1: | File:Maria Cantwell (cropped).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,803,364 |
| Percentage1: | 58.3% |
| Nominee2: | Susan Hutchison |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,282,804 |
| Percentage2: | 41.5% |
| Map Size: | 250px |
| U.S. senator | |
| Before Election: | Maria Cantwell |
| Before Party: | Democratic Party (US) |
| After Election: | Maria Cantwell |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Washington.
See also: List of United States senators from Washington.
Three-term Democrat Maria Cantwell was re-elected with 61% of the vote in 2012. She ran.[121]
Washington holds non-partisan blanket primaries, in which the top two finishers advance to the general election regardless of party. Cantwell and former state Republican Party chair Susan Hutchison faced each other in November.
Cantwell won re-election by a large margin.[122]
| Election Name: | West Virginia election |
| Country: | West Virginia |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in West Virginia |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in West Virginia |
| Next Year: | 2024 |
| Turnout: | 47.04% |
| Nominee1: | Joe Manchin |
| Image1: | Senator Manchin (cropped 2).jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 290,510 |
| Percentage1: | 49.57% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 271,113 |
| Percentage2: | 46.26% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in West Virginia.
See also: List of United States senators from West Virginia.
One-term Democrat Joe Manchin was elected with 61% of the vote in 2012. He originally won the seat in a 2010 special election. Manchin ran for re-election and won the May 8 Democratic primary.[123] Environmental activist Paula Jean Swearengin,[123] also ran for the Democratic nomination.
West Virginia Attorney General Patrick Morrisey received the Republican nomination in the May 8 primary. Representative Evan Jenkins,[123] coal miner Bo Copley,[123] Jack Newbrough, Don Blankenship, and Tom Willis ran for the Republican nomination.[123]
Despite recent Republican successes in West Virginia, Manchin was able to win re-election to a second term.[124]
| Election Name: | Wisconsin election |
| Country: | Wisconsin |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Wisconsin |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Wisconsin |
| Next Year: | 2024 |
| Turnout: | 81.81% |
| Nominee1: | Tammy Baldwin |
| Image1: | Tammy Baldwin, official portrait, 113th Congress.jpg |
| Party1: | Democratic Party (US) |
| Popular Vote1: | 1,472,914 |
| Percentage1: | 55.36% |
| Party2: | Republican Party (US) |
| Popular Vote2: | 1,184,885 |
| Percentage2: | 44.53% |
| Map Size: | 220px |
| U.S. senator | |
| Before Party: | Democratic Party (US) |
| After Party: | Democratic Party (US) |
See main article: 2018 United States Senate election in Wisconsin.
See also: List of United States senators from Wisconsin.
One-term Democrat Tammy Baldwin was elected with 51% of the vote in 2012. She ran.
State Senator Leah Vukmir and businessman and member of Wisconsin Board of Veterans Affairs Kevin Nicholson[125] ran for the Republican nomination, with Vukmir proceeding to the general election.
Baldwin was re-elected with over 55% of the vote.[126]
| Election Name: | Wyoming election |
| Country: | Wyoming |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2012 United States Senate election in Wyoming |
| Previous Year: | 2012 |
| Next Election: | 2024 United States Senate election in Wyoming |
| Next Year: | 2024 |
| Turnout: | 77.43% |
| Image1: | John Barrasso official portrait 112th Congress.jpg |
| Nominee1: | John Barrasso |
| Party1: | Republican Party (US) |
| Popular Vote1: | 136,210 |
| Percentage1: | 66.96% |
| Party2: | Democratic Party (US) |
| Popular Vote2: | 61,227 |
| Percentage2: | 30.10% |
| Map Size: | 250px |
| U.S. senator | |
| Before Party: | Republican Party (US) |
| After Party: | Republican Party (US) |
See main article: 2018 United States Senate election in Wyoming.
See also: List of United States senators from Wyoming.
One-term Republican John Barrasso was elected with 76% of the vote in 2012. Barrasso was appointed to the seat in 2007 and won a special election in 2008. He ran.[127]
Gary Trauner,[127] a Jackson Hole businessman and U.S. House candidate in 2006 and 2008, was the Democratic nominee.
Barrasso was easily elected to a second term, defeating Trauner.[128]