BUFFALO, N.Y. — Donald Trump made an unfortunate slip-of-the-tongue while campaigning in Buffalo, New York, at his final campaign rally before Tuesday's big-prize primary.

Trump was about to deliver prepared remarks lauding New York values when he mistakenly mentioned the name of a popular convenience store chain in place of 9/11.

He told the crowd: "It's very close to my heart because I was down there, and I watched our police and our firemen down at 7-Eleven, down at the World Trade Center right after it came down, and I saw the greatest people I've ever seen in action."

Trump has repeatedly invoked the September 11 attacks as he's campaigned across his home state.

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