Joe BidenJoe BidenBiden evokes 1968, asks voters to imagine if Obama had been assassinated Biden blasts Trump's 'embarrassing' actions heading into G-7 summit Steyer calls on DNC to expand polling criteria for debates MORE says he's ready to go head-to-head — or deltoid-to-deltoid — against President TrumpDonald John TrumpDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' EU says it will 'respond in kind' if US slaps tariffs on France Ginsburg again leaves Supreme Court with an uncertain future MORE in a pushup contest. 

The former vice president made the comment during a Tuesday interview on MSNBC's "Morning Joe" after co-host Mika BrzezinskiMika Emilie BrzezinskiBrzezinski fires back at Trump after he lashes out at 'Morning Joe': 'I'm sad and disgusted' Trump rips Scarborough, Brzezinski: 'Morning Joe & Psycho ratings have really crashed' Scarborough implores Democrats: Go hard after Trump or he'll win in 2020 MORE asked how he would respond if Trump made fun of his age or mental state on the debate stage.
 
"I'll say, 'Come on, Donald. Come on, man,' " Biden, 76, replied with a grin. "How many pushups do you want to do, pal?"
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"Come on, run with me, man," the Democratic front-runner said he'd say to his 73-year-old political opponent.
 
Trump has repeatedly referred to the ex-VP as "Sleepy Joe." When Biden entered the 2020 race in April, Trump tweeted that he hoped Biden had "the intelligence, long in doubt, to wage a successful primary campaign."
 
Trump's reelection campaign didn't immediately return ITK's request for comment about Biden's pushup remarks.
 
A potential pushup showdown wouldn't be the first time a political figure has put their upper body strength on display.