Mr. Stringer, the city comptroller, has sought to be the left-wing standard-bearer in the contest and had gained momentum in recent weeks, in part because of the backing of the Working Families Party, which his allies had seen as a turning point in the race. But the sexual misconduct accusation from a former campaign worker, which came to light this week, has sparked an outcry, placing mounting political pressure on the candidate.
The woman, Jean Kim, now a political lobbyist, accused Mr. Stringer of sexually assaulting her when she worked on his 2001 race for public advocate. She said that Mr. Stringer, who was then a state assemblyman, had groped her, made other unwanted sexual overtures and told her to keep those actions quiet. Mr. Stringer has strenuously denied those claims, saying that they had a consensual relationship that stretched over a few months.
But he has faced increasing pressure this week, losing the endorsement of several prominent lawmakers who had supported his campaign. A person familiar with the Working Families Party’s decision said its members felt Mr. Stringer was dismissive toward Ms. Kim and her account.
“We approached this moment with the deliberate reflection, discussion, and input from members and leaders across the party that it required,” Sochie Nnaemeka, the party’s state director, said in a statement. “Jean Kim shared her experience of sexual assault and Scott Stringer failed to acknowledge and consider his responsibility for that harm.”
Mr. Stringer, who has stressed a zero-tolerance policy for sexual harassment and has said he believes women deserve to be heard, issued a pre-emptive statement earlier Friday afternoon.