Joltin’ Joe vs. Dynamite Don

President Trump on Thursday came out swinging at Joe Biden for wanting to “beat the hell” out of him, tweeting that the former veep would “go down fast and hard” in a septuagenarian smackdown.

“Crazy Joe Biden is trying to act like a tough guy. Actually, he is weak, both mentally and physically, and yet he threatens me, for the second time, with physical assault,” the 71year-old president tweeted at 6:20 a.m.

“He doesn’t know me, but he would go down fast and hard, crying all the way. Don’t threaten people Joe!”

Speaking at an anti-sexual assault rally in Florida on Tuesday, Biden, 75, cited lewd comments Trump made in the infamous 2005 “Access Hollywood” tape about forcibly kissing and groping women’s genitals.

“A guy who ended up becoming our national leader said, ‘I can grab a woman anywhere and she likes it,’ ” Biden told the crowd at the University of Miami.

“They asked me if I’d like to debate this gentleman, and 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.”

Shortly after the tape’s release in 2016, Trump dismissed his offensive remarks about women as “locker room talk.”

At Tuesday’s rally, Biden said he was a “pretty damn good athlete” and had spent a lot of time in locker rooms.

“Any guy that talked that way was usually the fattest, ugliest SOB in the room,” he said.

Trump, at 6-foot-3 and 236 pounds, has a height and weight advantage over the 6foot, 180-pound Biden.

But the Democrat, who works out regularly, might be fleeter of foot, and got an A-minus rating, compared with the exer- cise-averse Trump’s C-plus, from the Web site Health Fitness Revolution, which rated the presidential candidates before the 2016 election.

Vice President Mike Pence was asked to pick a winner in the matchup during an interview with radio host Howie Carr on Thursday.

“You know who I’d be betting on,” Pence said, laughing and making it obvious it would be Trump.

“It’s just a little bit of trash talk going on, just got to make you chuckle in American politics today.”