The U.S. Supreme Court on Friday said it will consider the legality of the Trump administration’s effort to end an immigration program that allows hundreds of thousands of immigrant children, many now adults, to remain in the country lawfully.

The high court agreed to decide the government’s challenge to an injunction blocking the wind down of the Deferred Action for Childhood Arrivals, or DACA, program, in the consolidated cases U.S. Department of Homeland Security v. Regents of the University of California. The court set one hour for oral argument.