Since returning to the White House, President Donald Trump has launched an unprecedented campaign of immigration enforcement that has pushed the limits of executive power and clashed with federal judges trying to restrain him.

Three federal judges sharply questioned the legality of Trump’s tactics.

There has been concern that President Trump’s immigration crackdown would one day extend beyond undocumented immigrants to target U.S. citizens. The arrest of Mohsen Mahdawi, a pro-Palestine activist and green-card holder who was detained by ICE agents last week at his naturalization interview in Colchester,