The U.S. Supreme Court said Monday that it will hear a challenge to the Trump administration's use of Pentagon money to build the southern border wall and also its appeal of a ruling that blocked the sending of asylum applicants to Mexico while they wait for their appeals to be heard.

A federal appeals court ruled in June that the government improperly diverted $2.5 billion of Pentagon counter-drug program money to build more than 100 miles of border wall. The court said only Congress could approve such a transfer.