New York City Mayor Bill de Blasio and his security detail violated both Mexican and U.S. immigration laws by crossing the border on foot during a visit near El Paso, Texas, U.S. Customs and Border Protection alleges in a letter obtained by The Associated Press.
The mayor's office flatly denied the allegation.
De Blasio, a fierce critic of the Trump administration's immigration policies, went to the Texas border with about 20 other mayors from around the country on June 21, the day after President Donald Trump signed an order stopping family separations at the border.
More than 2,300 families were separated as a result of the administration's zero-tolerance policy, which criminally prosecutes anyone caught crossing illegally. The mayors said Trump had failed to address a humanitarian crisis of his own making.