Republican presidential front-runner Donald TrumpDonald John TrumpBooker hits Biden's defense of remarks about segregationist senators: 'He's better than this' Booker hits Biden's defense of remarks about segregationist senators: 'He's better than this' Trump says Democrats are handing out subpoenas 'like they're cookies' MORE on Monday mistakenly referred to the Sept. 11, 2001, terrorist attacks as “7-11.”

“I was down there, and I watched our police and our firemen, down on 7-11, down at the World Trade Center, right after it came down, and I saw the greatest people I’ve ever seen in action," he said during a rally Monday.

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"I saw the bravest people I’ve ever seen, including the construction workers, including every person down there,” he continued.

“That’s what New York values are about.”

Trump was campaigning in Buffalo ahead of the Empire State’s primary on Tuesday.