| Election Name: | 2008 United States Senate election in Maine |
| Country: | Maine |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2002 United States Senate election in Maine |
| Previous Year: | 2002 |
| Next Election: | 2014 United States Senate election in Maine |
| Next Year: | 2014 |
| Election Date: | November 4, 2008 |
| Image1: | 2008 Susan Collins 2 by 3 crop.jpg |
| Nominee1: | Susan Collins |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 444,300 |
| Percentage1: | 61.33% |
| Nominee2: | Tom Allen |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 279,510 |
| Percentage2: | 38.58% |
| U.S. Senator | |
| Before Election: | Susan Collins |
| Before Party: | Republican Party (United States) |
| After Election: | Susan Collins |
| After Party: | Republican Party (United States) |
The 2008 United States Senate election in Maine took place on November 4, 2008. Incumbent Republican U.S. Senator Susan Collins won re-election to a third term against Democrat Tom Allen, the U.S. Congressman from the 1st district.
Allen tried to tie Collins to George W. Bush, but these tactics failed as Collins maintained her image as a very popular, moderate, independent Republican. She obtained an endorsement from Independent and former Democratic U.S. Senator Joe Lieberman.[1]
When Collins was first elected in 1996 she pledged to serve only two terms (twelve years) in office, which would have been up in 2008. She instead decided to seek a third term, and defeated Allen with over 60% of the vote. She was the only Republican Senate candidate to win in 2008 in a state that was simultaneously won by Democratic presidential nominee Barack Obama.
| Source | Ranking | As of | ||
|---|---|---|---|---|
| align=left | The Cook Political Report[2] | October 23, 2008 | ||
| align=left | CQ Politics[3] | October 31, 2008 | ||
| align=left | Rothenberg Political Report[4] | November 2, 2008 | ||
| align=left | Real Clear Politics[5] | November 1, 2008 |
| Poll source | Dates administered | Tom Allen (D) | Susan Collins (R) | |||
|---|---|---|---|---|---|---|
| align=left | Rasmussen Reports[6] | November 1, 2008 | 41% | 57% | ||
| align=left | Survey USA[7] | October 20, 2008 | 43% | 54% | ||
| align=left | Rasmussen Reports[8] | October 2, 2008 | 43% | 53% | ||
| align=left | Survey USA[9] | September 22–23, 2008 | 39% | 55% | ||
| align=left | Rasmussen Reports[10] | September 17, 2008 | 42% | 55% | ||
| align=left | Rasmussen Reports[11] | August 12, 2008 | 40% | 55% | ||
| align=left | Rasmussen Reports[12] | July 17, 2008 | 42% | 49% | ||
| align=left | Pan Atlantic SMS Group[13] | June 18, 2008 | 31% | 56% | ||
| align=left | Rasmussen Reports[14] | June 16, 2008 | 42% | 49% | ||
| align=left | Rasmussen Reports[15] | May 14, 2008 | 42% | 52% | ||
| align=left | Rasmussen Reports[16] | April 1, 2008 | 38% | 54% | ||
| align=left | McLaughlin & Associates/ Coalition for a Democratic Workforce[17] | March 6–9, 2008 | 31% | 54% | ||
| align=left | Critical Insights[18] | October 12–30, 2007 | 34% | 54% | ||
| align=left | Survey USA[19] | October 26–29, 2007 | 38% | 55% | ||
| align=left | Research 2000/Daily Kos[20] | October 15–17, 2007 | 33% | 56% |