Troy Jackson speaks at the Bangor Cross Insurance Center on July 24, 2026 in Bangor, Maine. Ashley L. Conti for NPR hide caption

Ashley L. Conti for NPR

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Troy Jackson has defeated Republican incumbent Susan Collins for U.S. Senate in Maine, according to a race call by the Associated Press, a crucial victory for Democrats in their push to win back the Senate majority.

The Democratic Party has long tried to oust Collins, and at a moment when President Trump's approval ratings are at historic lows, Democrats saw Maine as one of their best opportunities to flip a Republican seat.

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As the longest-serving Republican woman in the Senate, Collins entered the race with a history of defying national political headwinds, repeatedly winning in a state that has consistently voted for Democrats at the state level.…