The 2008 United States Senate election in Maine was held on November 4, 2008, to elect a member of the United States Senate to represent the state of Maine. Republican incumbent Susan Collins won re-election to a third term, defeating Democratic congressman Tom Allen.
Republican primary
Candidates
Nominee
- Susan Collins, incumbent U.S. senator (1997–present)
Democratic primary
Candidates
Nominee
- Tom Allen, U.S. representative from ME-01 (1997–2009)
Eliminated in primary
General election
Campaign
Allen tried to tie Collins to George W. Bush, the tactics of which failed, as Collins maintained her image as a popular, moderate, independent Republican.
When Collins was first elected in 1996, she pledged to serve only two terms (twelve years) in office, which would have ended in January 2009. She 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 Democratic presidential nominee Barack Obama simultaneously won.
Post-primary endorsements
Susan Collins (R)