"I can't be eating crap on the trail too often, because I need to stay in presidential form," Yang said, adding that no one wants "a president who doesn't seem like they can run a mile."

He previously told The New York Times that Kind Bars were his go-to campaign-trail snack.

"I don't think Donald Trump could run a mile. Would you guys enjoy trying to watch Donald Trump run a mile? That'd be hysterical. What does that guy weigh, like, 280 or something?" he said. The Daily Mail noted that Trump weighed 243 pounds in February.

"I say he, like, passes out at, like, the quarter-mile mark," Yang said.

While Yang's staff tried to get him back on track, he continued criticizing Trump, saying: "I'd challenge Donald Trump to any physical or mental feat under the sun. I mean, gosh, what could that guy beat me at, being a slob?"

He added: "Like, what could Donald Trump possibly be better than me at? An eating contest?"

Yang concluded that Trump would probably beat him at "something that involved, like, trying to keep something on the ground and having really large body mass — like, if there was a hot-air balloon that was rising and you needed to try and keep it on the ground, he would be better than me at that, because he is so fat," the Daily Mail and the Atlantic reported.