Joe Biden's deputy campaign manager denounced Julián Castro's "disrespectful" debate-night attack on the former vice president.

"He was wrong on the facts," Kate Bedingfield said Friday on MSNBC. "He came at Vice President Biden in a very personal and disrespectful way and was also actually factually wrong about his attack."

"It frankly went over like a lead balloon in the room. I think it has been generally panned as being disrespectful and classless," she added.

Castro, 44, attacked Biden on stage, asking him, "Are you forgetting already what you said just two minutes ago?"

"I mean, I can’t believe that you said two minutes ago that they had to buy in, and now you’re saying they don’t have to buy — you’re forgetting that," he added in a heated exchange with Biden.

His comments were widely condemned by the media and fellow competitors as ageist, and he was forced to defend them on Friday. "I wouldn’t do it differently," Castro said. "That was not a personal attack."