via LurkerNoMOre
During a Thursday-morning CNN interview, Trump hit Rubio as a "kid" in a wide-ranging critique.
He first bashed Rubio's credibility as a foreign-policy wonk when asked to compare their knowledge about Syria.
"Marco Rubio sits behind a desk sometimes and he reads stuff," Trump said, according to CNN's transcript. "That's all he does. I create jobs all day long. I'll know more about all of this than all of them put together, and believe me, we'll have a winning strategy. If Marco Rubio is good, how come we're doing so badly?"
Trump went on to dismiss the 44-year-old senator's age.
"These guys don't know how to win," he said. "Marco Rubio, he's like a kid. He shouldn't even be running in this race, as far as I'm concerned. He's a kid."
Later in the interview, Trump again called Rubio a "kid" and criticized him for not deferring his candidacy to Jeb Bush, the former Florida governor.
"He's a kid. He has no right — I mean, frankly, he was very disloyal to Bush," Trump said. "Bush was his mentor. And everyone said he'd never run because Bush was his mentor. Well, the fact that Bush was his mentor didn't stop this young guy who is overly ambitious from wanting to run. Now Bush looks foolish and he looks like he's a very disloyal guy, frankly."
Earlier in the day, during a "Morning Joe" interview, Trump also mocked Rubio for perspiring during last week's presidential debate.
"I'm looking at guys like Marco Rubio, who has the worst voting record in the United States Senate. And [he's a] young guy — although he sweats more than any young person I've ever seen in my life," Trump said. "I've never seen a guy down water like he downs water. They bring it in in buckets for this guy."