Maine US Senate 2026
Election day is November 3, 2026. A statewide contest in Maine.
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About this race
The 2026 United States Senate election in Maine will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of Maine. Republican incumbent Susan Collins is seeking a sixth term. She is being challenged by Democratic former state Senate president Troy Jackson. The election will be conducted with ranked-choice voting.
In the June 9 primaries, Collins was the only candidate to qualify for the Republican nomination. Sullivan harbor master Graham Platner won the Democratic primary over Governor Janet Mills with the support of progressive leaders, but withdrew from the race on July 10 following sexual assault accusations and other controversies. Jackson was selected to replace Platner at a nominating convention on July 25.
As Collins is the only Republican senator representing a state that President Donald Trump did not win in any of his three presidential campaigns, the race is considered to be among the most competitive in 2026. Democrats have not won a Senate election in Maine since 1988 and not for this seat since 1972.