Former Vice President Joe Biden held a campaign event Thursday in Iowa where a heated discussion with an attendee has since gone viral.

The man, who described himself as an 83-year-old retired farmer to NBC News, compared Biden's diplomatic efforts in Ukraine to President Trump's, which drew anger from the 2020 candidate.

"You're a damn liar, man. That's not true, and no one has ever said that," Biden said in response to the accusation that he had his son Hunter go to Ukraine "to get access to" ex-Ukrainian President Petro Poroshenko. "No one has proved that."

After receiving a little more pushback on the question, the man attempted to walk back a bit, suggesting that he never insinuated wrongdoing by the former VP.

"You said I set up my son to work at an oil company," Biden said. "Isn't that what you said? Get your words straight, Jack."

This is not the first time Biden has been questioned at one of his events about his past actions. Last month, when questioned about the Obama administration's record number of deportations, Biden responded to the gentleman by saying, “You should vote for Trump.”

Since the Iowa incident Thursday, both Biden and his campaign adviser Symone Sanders have denied reports that he referred to the man as "fat," instead claiming he used the word "facts." Biden has also stated that he regrets challenging the man to a pushup contest.