Election 2026 Maine Senate

Attendees celebrate as Democratic U.S. Senate candidate Graham Platner speaks during a primary election night watch party after winning the Democratic nomination Tuesday, June 9, 2026, in Blue Hill, Maine.

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Democrat Graham Platner will try to unseat GOP Sen. Susan Collins in a critical Senate matchup

Democrat Graham Platner will try to unseat GOP Sen. Susan Collins in a critical Senate matchup

Graham Platner has won the Maine Democratic primary for U.S. Senate, setting up a high-stakes race against Republican Sen. Susan Collins. Platner is an oyster farmer and former chair of the planning board in the small town of Sullivan, has little political experience. But he has drawn hundreds of people to rallies around the state. He also has faced a series of controversies that have been the focus of GOP attacks. Democrats see Maine as a top opportunity to flip a GOP-held seat. It is the only state with a competitive Senate race where voters supported Democrat Kamala Harris over Donald Trump in 2024. Collins is the only Republican senator from New England.