President Trump’s visit to the U.N. got off to a shaky start when an escalator stopped right after he got on it. A U.N. official said the U.N. understands someone from the president’s party ran ahead of him and inadvertently triggered the stop mechanism.

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UNITED NATIONS (AP) — President Donald Trump broke from his prepared remarks at the United Nations on Tuesday to bemoan an inoperable escalator and a defective teleprompter, using the incidents to portray the global body as dysfunctional.

“All I got from the United Nations was an escalator that on the way up stopped right in the middle,” he mused, chopping the air with his hand.

But it turns out the cause was closer to Trump.