Presumptive GOP presidential nominee Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Thursday pointed to a plane flying above his event and said it could be a Mexican plane preparing to attack.

"That could be a Mexican plane up there — they're getting ready to attack," Trump said as the plane flew overhead.

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Trump, delivering a speech about trade in New Hampshire, said he respects Mexico and its leaders but bashed the United States's trade agreements with its neighbor.

"What they've done to us is incredible," he said. "Their leaders are so much smarter, so much sharper, and it's incredible."

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During the event, Trump said the United States has had job losses and massive trade deficits because of lopsided trade deals.

He slammed the country's trade policies, especially the pending Trans-Pacific Partnership and the North American Free Trade Agreement.