President Trump mocked Gov. Andrew Cuomo on Wednesday for saying America “was never that great.”

“ ‘WE’RE NOT GOING TO MAKE AMERICA GREAT AGAIN, IT WAS NEVER THAT GREAT.’ Can you believe this is the Governor of the Highest Taxed State in the U.S., Andrew Cuomo, having a total meltdown!” Trump tweeted in the wake of Cuomo’s gaffe.

Cuomo tweeted back at Trump 25 minutes later: “What you say would be `great again’ would not be great at all.”

“We will not go back to discrimination, segregation, sexism, isolationism, racism or the KKK,” Cuomo continued. “Like NY’s motto says: Excelsior – Ever Upward (not backward).”

Earlier in the day, the governor was signing legislation dealing with human trafficking when he took an awkward swipe at Trump’s famed campaign slogan, “Make America Great Again.”

“We’re not going to make America great again,” Cuomo said at the Lower East Side event. “It was never that great. We have not reached greatness. We will reach greatness when every American is fully engaged.”

The line went over like a lead balloon and the crowd groaned.

Cuomo even took heat from the left, with his liberal gubernatorial challenger Cynthia Nixon blasting him.

“I think it’s just another example of Andrew Cuomo trying to figure out what a progressive sounds like and missing by a mile,” Nixon said.