Former Vice President Joe Bidenif they were in high school for how he treats women.
In a "Pod Save America" interview released Wednesday, the Democrat said "I shouldn't have said what I said."
At a University of Miami rally against sexual assault last week, Biden cited lewd comments that Republican candidate Trump made in aabout grabbing women without their permission.
"A guy who ended up becoming our national leader said, 'I can grab a woman anywhere and she likes it,'" Biden said, according to ABC News. "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.'"
The 75-year-old made similar comments in the closing days of the 2016 campaign.
Mr. Trump tweeted: "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. He doesn't know me, but he would go down fast and hard, crying all the way. Don't threaten people Joe!"
Biden said he should not have brought it up again. He said "I don't want to get down in the mosh pit with this guy."Biden says he regrets saying he'd fight Trump