Speaking to the National Republican Congressional Committee on Tuesday night, Mr Trump attacked Ms Ocasio-Cortez’s so-called Green New Deal proposal as “the craziest thing”, and suggested the Democrats were “petrified” of her.
“The Green New Deal, done by a young bartender, 29 years old,” he said, referring to her previous employment. “A young bartender, wonderful young woman.”
The insult followed Ms Ocasio-Cortez’s attack on the White House security clearance process after a whistleblower claimed several individuals had received approval despite disqualifying issues.
The congresswoman said reports suggested “that we are conducting foreign relations with folks with security clearances via WhatsApp”.
She added: “I mean, every day that we go without getting to the bottom of this matter is a day that we are putting hundreds, if not potentially thousands of Americans at risk.
“What is next? Putting nuclear codes in Instagram DMs? This is ridiculous.”
Her remarks were an apparent reference to evidence previously seen by the committee that the president’s son-in-law Jared Kushner used WhatsApp to communicate with Saudi Crown Prince Mohammed bin Salman.
A Democratic-led committee later voted to subpoena Carl Kline, the former White House security clearance chief, over allegations that the Trump administration inappropriately reversed career officials’ decisions to deny security clearances to some of the president’s advisers.
Whistleblower Tricia Newbold said the Trump administration overruled security experts to give questionable clearances to more than two dozen people.
Two sources familiar with the congressional investigation told Reuters that two of the senior officials whose clearances Ms Newbold said were initially denied were Mr Trump’s daughter Ivanka Trump and Mr Kushner.
Speaking at the Republican fundraiser event on Tuesday evening, Mr Trump did not address Ms Ocasio-Cortez’s security criticisms, but did concede that the Democrats had a potential electoral advantage on one key issue: health care.
“We have to take that away from them,” the president said. “Republicans should not run away from health care,” he added. “You can’t do it. You’re going to get clobbered.”
He also said some of the Democrats’ proposals could prove enticing to votes in the short term. He said free health care sounds very seductive. “Don’t underestimate the power of socialism to get a vote.”
The president suggested Ms Ocasio-Cortez’s climate change concerns were outside of the mainstream. “If they beat me with the Green New Deal, I deserve to lose,” he said.