Maine Rep. Jared Golden, the only Democrat in the House to vote for the Republican-led government funding bill, drew a primary challenger Monday who accused him of consistently siding with the GOP over his own party.

State Auditor Matthew Dunlap’s bid sets the stage for a high-profile showdown in a district Democrats will likely need to hold to regain control of the US House. Golden represents one of the country’s most competitive districts, winning his 2024 race by less than a percentage point while Donald Trump carried it by roughly 10 points.

Defending the vote in a statement, Golden said that the shutdown “is the result of hardball politics driven by the demands far-left groups are making for Democratic Party leaders to put on a show of their opposition to President Trump.”