Speaking to supporters in Iowa on Saturday, Trump said he would crack down on visitors to the United States who overstay their visas and declared that when any American citizen "loses their job to an illegal immigrant, the rights of that American citizen have been violated." And he is scheduled to give a major address on immigration in Arizona on Wednesday night.

But the mogul's New York modeling agency, Trump Model Management, has profited from using foreign models who came to the United States on tourist visas that did not permit them to work here, according to three former Trump models, all noncitizens, who shared their stories with Mother Jones. Financial and immigration records included in a recent lawsuit filed by a fourth former Trump model show that she, too, worked for Trump's agency in the United States without a proper visa.