Republican presidential nominee Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE gained a surprise endorsement on Sunday — from New York City’s Naked Cowboy.

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Robert Burck, better known as The Naked Cowboy, stood outside Trump Tower singing an original song endorsing the billionaire.

“If you really want to make America great again, vote for the man whose name is on my rear end,” he sang, with Trump’s name printed on his underwear.