| Election Name: | 1970 United States Senate election in Connecticut |
| Country: | Connecticut |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1964 United States Senate election in Connecticut |
| Previous Year: | 1964 |
| Next Election: | 1976 United States Senate election in Connecticut |
| Next Year: | 1976 |
| Election Date: | November 3, 1970 |
| Nominee1: | Lowell Weicker |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 454,721 |
| Percentage1: | 41.74% |
| Nominee2: | Joseph Duffey |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 368,111 |
| Percentage2: | 33.79% |
| Image3: | File:Thomasjdodd.jpg |
| Party3: | Independent politician |
| Popular Vote3: | 266,497 |
| Percentage3: | 24.46% |
| Map Size: | 220px |
| U.S. Senator | |
| Before Election: | Thomas J. Dodd |
| Before Party: | Democratic Party (United States) |
| After Election: | Lowell Weicker |
| After Party: | Republican Party (United States) |
The United States Senate election of 1970 in Connecticut was held on November 3, 1970. Incumbent Democratic Senator Thomas J. Dodd ran for a third term in office. After Dodd was censured in the Senate's first modern ethics case, he lost party support for re-election but stood as an independent. Republican U.S. Representative Lowell Weicker defeated Dodd and Democratic candidate Joseph Duffey.
In January 1966, Drew Pearson and Jack Anderson published a series of syndicated newspaper columns describing Senator Thomas J. Dodd's association with Julius Klein, a West German public relations consultant.[1] The columns alleged that Dodd had engaged in fundraising improprieties and had diverted campaign funds for personal expenses. A formal Senate investigation ensued which lasted over one year, finding that Dodd had traveled to West Germany at Klein's behest and had transferred campaign funds to his personal accounts. Dodd initially refused to cooperate with the investigation by withholding financial statements and bringing several legal challenges against the committee; the committee responded by holding public hearings on the matter which severely damaged Dodd's reputation.[1]
On June 23, 1967, the Senate voted to censure Dodd by a vote of 92 to 5. His was the seventh censure in the history of the United States Senate and the first focused on financial impropriety. The resolution stated that Dodd had used his office as a United States senator "to obtain and use for his personal benefit, funds from the public through political testimonials and a political campaign," conduct which was "contrary to accepted morals, derogates from the public trust expected of a Senator, and tends to bring the Senate into dishonor and disrepute."[1] Dodd stated in response, "I believe now, I shall continue to believe, that history will justify my conduct and my character."[1] The Senate adopted four new rules of ethical disclosure, including a form of financial disclosure, in 1968.[1]
Lowell Weicker was re-elected twice in 1976 and 1982 before losing a bid for a third term to Joe Lieberman in 1988. He served one term as Governor of Connecticut from 1991 to 1995. He briefly ran for President in 1980.
Thomas J. Dodd died suddenly of a heart attack on May 24, 1971. Newspaper obituaries noted that the senator had steadfastly claimed that he was innocent until the moment of his death.[1] His son, Christopher, would join Weicker as the junior senator from Connecticut in 1981 and ran for President in 2008.
Joseph Duffey retired from electoral politics but led a long career in academia and public office, serving in both the Jimmy Carter and Bill Clinton administrations. He married his campaign manager, Anne Wexler, in 1974 after both had divorced their spouses.