The House Democratic campaign arm has stepped up its interventions in high-profile contested primaries. But this week, it suffered its third primary defeat in two months.
Mr. Platner’s withdrawal, which comes after a woman accused him of rape, creates deep uncertainty in a race that both parties see as crucial to their hopes of winning the Senate.
Graham Platner, the Democratic Senate candidate in Maine, called the allegation false but said he would “reflect” on his political path forward, as many allies rescinded their endorsements.
