The Democratic Party is once again in upheaval as Graham Platner, its unconventional nominee to knock out longtime Republican Sen. Susan Collins in Maine, faces a rape accusation that threatens to end his once-powerful campaign and endanger Democrats’ chances of flipping a key seat in the November midterm elections.

Platner, a Marine veteran and oyster farmer whose anti-establishment campaign had already weathered a series of scandals, has denied the rape allegation from ex-girlfriend Jenny Racicot, which Politico first reported on Monday. His campaign said the allegation was “coached and coordinated by out-of-state establishment operatives,” though it was supported by messages Racicot sent in 2023, long before Platner had a political profile.

Despite Platner’s denials, a cascade of Democratic politicians, operatives, and organizations have called on him to drop out of the race by 5 p.m. next Monday, in time to be removed from the general election ballot. Platner has said he would only drop out if he’s allowed to pick his successor to face Collins in November. If Platner withdraws, Maine Democrats would have to pick a new candidate by July 27.

That’s set off a scramble to find a replacement nominee and point fingers over the darkest chapter yet in a race that had already drawn national attention for a series of controversies — including accusations that Platner had twisted another woman’s arm behind her back and trapped her in a room; a sexting scandal; a Nazi tattoo; and a series of Reddit posts in which he belittled sexual assault, asked why Black people don’t tip, and disparaged white and rural voters. (Platner has denied that he mistreated women and apologized for the tattoo, text messages, and Reddit posts.)