Former Vice President Joe Biden has already acknowledged he had reservations about his son's seedy international business deals, and yet at the Democratic presidential primary debate on Tuesday, he felt fully confident pretending he never did that.

CNN's Anderson Cooper, who helped moderate the debate, gave a helpful assist to Biden by asserting — without evidence! — that Hunter Biden had never done anything afoul while working with a Ukrainian gas company as his dad engaged with the country on policy matters.

Biden said that he did nothing wrong and his son did nothing wrong and that the real problem, of course, was President Trump.

Except his own son has already acknowledged that, at the very least, it was "poor judgment" to take a job that paid him tens of thousands of dollars each month while his dad was making policy decisions with the government of the country that was investigating that very company.

Joe Biden himself has admitted that he knew there was something concerning about what his son was doing. “He did say at one point that it came out that he was on the board [of Ukrainian gas company Burisma],” Biden recalled in a recent radio interview, “I said, ‘I sure hope to hell you know what you’re doing.' Period. I said that.”

Asked by the interviewer Jack Heath what exactly it was that concerned Biden about his son and Burisma, the 2020 candidate said, “What his job was.”

Um ... Does this not bother Cooper? Anyone?

Biden is in quicksand, and his answer at the debate won't help it.