Graham Platner Wins Maine Democratic Senate Primary

Graham Platner won the Maine Democratic primary for U.S. Senate on Tuesday, setting up a November contest against Republican Sen. Susan Collins. Multiple outlets projected the result after polls closed. The NRSC warned Republicans that the Democrat remains a credible threat to Collins in the pivotal Senate race.

Platner clinched the nomination to take on Collins, according to multiple outlets covering Tuesday's results. Party leaders and allies have increasingly backed Platner as the primary approached. Sen. Bernie Sanders and Rep. Ro Khanna have formally endorsed Platner.

and Candidate Responses

Sanders and Platner appeared together at a "Fighting Oligarchy" tour stop at the Collins Center for the Arts on the University of Maine campus in Orono on May 24, 2026. Collins has repeatedly declined to comment on allegations surrounding Platner. "I really have nothing to add to it," Collins told Fox News Digital when asked about the allegations.

Outside organizations backing Collins have aired ads and amplified criticism of the Maine Democrat.

Democrats have directly targeted Collins over her voting record and argue that flipping the seat remains a top priority. Platner has continued campaigning with top lawmakers such as Sanders and Khanna. With polls open Tuesday, Maine voters determined whether Platner advances to face Collins in the general election.