Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE’s book tour stop in Delaware over the weekend was interrupted by a heckler who accused the former vice president of sexual misconduct.

The News Journal in Wilmington reported Biden, who was promoting his memoir “Promise me, Dad: A Year of Hope, Hardship and Purpose” in Delaware on Sunday, was recounting his son Beau’s reaction to a pediatrician’s 2017 conviction for molesting infants.

A man in the crowd then stood up and shouted, “What about the girls you molested on C-Span at the Senate swearing in?”

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Much of the crowd then began booing and shouting at the man.

“This is not Trump world,” Biden said in response, prompting cheers from the audience.

Security escorted the man, who filmed the incident, out of the auditorium. Video of the incident was later posted on Twitter. The tweet attributes the question to a man whose profile says he "confronts the deep state."

The questioner, identified on Twitter as PG Howie, has previously posted allegations against Biden using clips from C-Span that he charges show the former vice president inappropriately interacting with women, including children. Some critics say Biden has a habit of touching women without asking permission, such as rubbing their shoulders or putting an arm around them.

Biden has been a leading voice in the "It's On Us" campaign to combat sexual assault on college campuses. He has appeared in PSAs for the campaign, and has spoken on several campuses about the effort.

Biden has attacked President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE for his rhetoric toward women, saying he would have "beat the hell" out of the president in high school for bragging about groping women. He later apologized for his wording.

Biden is considered a potential Democratic presidential candidate in 2020. He has said he has not made a final decision on whether to run.