The political director for Graham Platner’s U.S. Senate campaign resigned Friday after Platner’s past online posts featuring numerous controversial remarks resurfaced this week.

Former state Rep. Genevieve McDonald of Stonington was one of the most prominent Maine Democrats who joined Platner’s campaign after a buzzy August launch saw the Sullivan oysterman and military veteran draw national attention in addition to big crowds at his town hall-style rallies. She sent her resignation letter exclusively to the Bangor Daily News.

The past week has dealt Platner, 41, the biggest test yet in his nascent campaign, and it coincided with Gov. Janet Mills joining the Democratic primary Tuesday for the chance to take on U.S. Sen. Susan Collins, R-Maine, in 2026. McDonald’s exit showed discord among the campaign that includes many progressive strategists from out of state.

CNN first reported Thursday on since-deleted posts Platner made a few years ago on Reddit that included Platner calling rural, white Americans “racist” and “stupid” and describing all police as “bastards.” Other old posts suggested violence is necessary to achieve social change, according to Politico’s reporting.