CHARLOTTESVILLE, Va. (CBS19 NEWS) -- President Joe Biden and Donald Trump have been sniping at each other this week over the possibility of facing off on the debate stage.

Biden has challenged Trump to a pair of debates, something the former president says he's "ready and willing" to do.

Dr. Larry Sabato with the UVA Center for Politics thinks that would be a popular idea.

"Most people want to see the two candidates for the most powerful office on the face of the Earth together on the same stage so that they can measure them one against the other," said Sabato.

But although he says presidential debates are part of the tradition in American politics, the truth is that many voters have already decided.

"Occasionally, you have a gaffe that is so serious that people reconsider their decision," he says.

Virginia Senator Mark Warner thinks debating Trump will help.

"He doesn't lay out any vision for the future of the country, it's all about him and his enemies, real and imagined, and I think if that gets out there in a debate would be a good format," he says.

Virginia Senator Tim Kaine thinks having a debate is a good idea.

"I don't think of this as a Joe Biden or Donald Trump thing. I think of it as the American public, the American voters. I think American voters are entitled to see the nominees for president debate," says Kaine.

Biden is calling on Trump to join him for two debates hosted by news outlets and has told the Commission on Presidential Debates that he will not participate in its previously scheduled fall debates.

In a letter, his campaign proposed dates in June and September because they say the original dates are quote "out of step with changes in the structure of elections and the interest of voters."

Trump responded to Biden's challenge in a social media post saying that he is quote "ready and willing" to debate his Democratic opponent. "Just tell me when, I'll be there," Trump wrote.

Two debates have been scheduled for June and September. This is earlier than usual presidential debates hosted by the Commission on Presidential Debates.

"People in Virginia and in other places start voting by the end of September. So, why not have the debates before people vote?" said Sabato.