A man snatched an American flag off a vehicle in Manhattan festooned with support slogans for President Trump — and was promptly arrested for the theft Sunday, police said.

Jared Handler, 37, grabbed the flag off of Rob Cortis’s vehicle as he was driving near 14th Street and Eighth Avenue at about 6:40 p.m., police said.

Handler then ran toward Union Square with the flag, but was busted by cops not far from the intersection, authorities said.