Susan Collins will defend her Senate seat this fall against Graham Platner, a Democrat and political newcomer whose unconventional candidacy has already roiled his own party and set the stage for one of 2024's most unpredictable races.
Collins, a Republican first elected in 1996, ran unopposed in Tuesday's primary as she seeks a sixth consecutive six-year term. Platner, a veteran and oyster farmer running for office for the first time, won the Democratic nomination after two-term Gov. Janet Mills abandoned her campaign, unable to gain momentum with voters.
The primary outcomes were expected. What comes next is decidedly not. Maine's Senate race has become a focal point in the national battle for chamber control, and Platner's path to the general election has been shadowed by controversies about his personal conduct and past online statements that have prompted some Democrats to question whether he should remain on the ballot.
Platner wasted no time sharpening his attack on Collins. At a victory rally in Blue Hill, he cast her as a betrayer who promised to protect abortion rights but voted to confirm Supreme Court Justice Brett Kavanaugh, leading to the reversal of Roe versus Wade. "Susan Collins may have started her career decades ago in Washington with good intentions, but she has become just as spineless and corrupt as the establishment she now serves," he said.
Collins responded by steering the conversation toward results and local concerns. "Mainers aren't looking for bitter campaigns, grand promises, or angry speeches riddled with lies," her campaign said in a statement. "They want affordable health care, safe communities, good-paying jobs, strong schools, and someone who will show up and do the work."
The race carries enormous weight in a narrowly divided Senate. Democrats currently hold 47 seats and need a net gain of four to claim the majority. Collins represents a particularly enticing target: she is the only Republican senator from a state President Donald Trump lost in 2024. Yet she has proved remarkably durable, surviving multiple challenges from well-funded Democratic candidates.
In 2020, Collins outperformed expectations and won by more than 8 points even as Trump lost Maine by about 9 points. Trump has endorsed her again, saying in March that Democrats must not take control of the Senate.
Platner embodies a starkly different political model than previous Collins opponents. Where Democrats have typically nominated center-left establishment figures, Platner runs as a populist outsider calling for higher taxes on the wealthy, expansion of the social safety net, and campaign finance reform. This positioning has resonated with some Democratic voters eager for a departure from the status quo.
But Platner carries substantial liabilities. He recently covered a chest tattoo after disclosing he hadn't known of its Nazi associations. Years-old Reddit posts show him criticizing police and making controversial comments about sexual assault victims, statements he has attributed to "Internet s---posting" that doesn't reflect his current views. More recently, ex-girlfriends have alleged "toxic" or "unsettling" behavior, claims Platner has denied while asserting there was no physicality involved.
The accumulation of controversies has created visible discomfort among Democratic leaders in Washington. Some party figures have suggested Platner should withdraw from the race, though he has firmly rejected that path. Party rules would allow replacement only if he voluntarily steps aside before July 13. His most prominent Senate backers, including Bernie Sanders and Elizabeth Warren, have signaled they remain in his corner.
Collins addressed the allegations directly. "The allegations against Graham Platner are extremely troubling and serious, and he owes the people of Maine a detailed answer," she said.
Early general election polling shows the race tightening into genuine competitiveness, with Collins seeking to localize the contest around her track record of securing federal funding for Maine through her position as chair of the Senate Appropriations Committee. She recently cast her 10,000th consecutive vote in the chamber, a record of reliability she plans to emphasize as the campaign intensifies.
Author Sarah Mitchell: "Platner's baggage could sink him, but underestimating his outsider appeal against an incumbent senator from Trump country would be a mistake."
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