No incumbent Senator has lost by such a large margin since Hathaway's 22.65-point loss, though James Abdnor in 1980, John Boozman in 2010, and Tommy Tuberville in 2020 all received larger percentages of the vote than Cohen's 56.59% against incumbent Senators.
Background
Elected to the U.S. Senate in 1972 in an upset victory against incumbent Margaret Chase Smith, Hathaway had established himself as a very liberal senator, being ranked an average of 92 percent more liberal than the Senate as a whole during his first term.[1] This put him at risk, considering the conservative nature of Maine before the 1990s.[2] Meanwhile, young former state senator Hayes Gahagan launched an independent campaign, running well to the right of Cohen.[3] Other candidates to join the race were independent John J. Jannace and perennial candidate Plato Truman.[4]
Primaries
Republican primary results
Republican Senate primary results: June 13, 1978[5]
During the campaign, all candidates hit the campaign trail hard, with Hathaway receiving significant support from Jimmy Carter, Edmund Muskie, Ted Kennedy, and other national Democrats.[7] The biggest surprise, however, came from Hayes Gahagan. Shortly before election day, he held a press conference where he announced that "unknown, subversive agents" had been altering his campaign photos by implanting subliminal images of female genitalia in his hairline.[8]
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