Biden Would Challenge Trump to Pushups Over Questions of Age

'How many pushups do you want to do here, pal?'

Former vice president Joe Biden said he would challenge President Donald Trump to do more pushups than him if Trump attacked Biden for his age or mental state.

"I'd say ‘Come on Donald, come on man. How many pushups do you want to do here, pal?' You know, jokingly. You know, come on, run with me, man," Biden told Morning Joe‘s Mika Brzezinski, in an interview that aired Tuesday morning.

Biden, who at 76 is 3 years older than President Trump, has previously said that he would "beat the hell out of" Trump for the way he talked about women.

"When a guy who ended up becoming our national leader said, ‘I can grab a woman anywhere and she likes it,'…they asked me would I like to debate this gentleman, I said no. I said ‘If we were in high school, I'd take him behind the gym and beat the hell out of him,'" Biden said at a rally at the University of Miami last year.

Biden would be 78 on inauguration day in 2020, which would make him the oldest president in U.S. history, as Ronald Reagan was 77 when he left office. Trump has labeled Biden "Sleepy Joe" and referred to himself as a "young, vibrant man."

Biden has said that raising the issue of age with presidential candidates is "totally legitimate."

"I think age is a totally legitimate thing to raise. I think it's totally appropriate for people to look at me and say if I were to run for office again, ‘Well God darn you're old.' Well chronologically I am old," Biden said, adding, "Every voter is entitled to know exactly what kind of shape you're in. You owe it to them. It's a legitimate question and so I think age is relevant."