A CNN panel said Joe Biden needs to come up with more substantive answers about Hunter Biden after he responded emotionally to an Iowa voter who asked about his son.

"He's going to have to have an answer to the question about his son," Jackie Kucinich, the Washington bureau chief for the Daily Beast, said Thursday on the network. "You can't get mad at every voter who asks that."

The host of the CNN panel, Jim Sciutto, called the question "legitimate," and Gloria Borger, CNN's chief political analyst, said she agreed that the former vice president "has to have an answer" to questions about his son.

Biden, 77, slammed a voter, calling him a "damn liar," after he brought up his son's business dealings with Ukraine and compared him to President Trump. The Delaware Democrat also appeared to mock the man's weight calling him "sedentary" and "fat."

"And if you wanna check out my shape on, let's do push-ups together, man. Let's run; let's do whatever you want to do," Biden said. When the voter protested that he did not accuse Biden of wronging, the former vice president responded, "You said I set up my son to work in an oil company, isn't that what you said? Get your word straight, Jack."

