Donald J. Trump said on Wednesday that, if elected again, he would revoke the legal status of tens of thousands of Haitian immigrants who have been the target of false accusations by the former president and his running mate, Senator JD Vance of Ohio, over the past month.

Mr. Trump’s administration tried to do that during his first term, too, but courts temporarily blocked it, and President Biden’s administration renewed the immigrants’ status after he took office in 2021.

The immigrants in question are living and working in the United States legally through the Temporary Protected Status program, which Congress created in 1990 for people from countries experiencing war, natural disasters or other crises. The Department of Homeland Security designates countries for up to 18 months at a time based on the current conditions, and the designation can be renewed indefinitely.

Haiti was initially added in 2010, under President Barack Obama, after a 7.0-magnitude earthquake devastated the country. It has since experienced a major hurricane and a cholera epidemic.

“Absolutely I’d revoke it, and I’d bring them back to their country,” Mr. Trump said in an interview with NewsNation on Wednesday.

He spoke at length about Haitian immigrants living in Springfield, Ohio, claiming that the city had been a utopia — “you had a beautiful, safe community, everyone’s in love with everybody, everything was nice, it was like a picture community” — and that the Haitians had destroyed it.

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