Administration officials said they expect the fight over using the wartime act to ultimately head to the Supreme Court.

A federal judge blocked the Trump administration from removing any migrants under the Alien Enemies Act late Saturday—but the White House said Sunday that hundreds of alleged gang members had still been sent to El Salvador.

A federal judge issued an order temporarily blocking the Trump administration from using the Alien Enemies Act of 1798 on Saturday, preventing the administration from using the wartime act to remove Venezuelan illegal immigrants who were believed to be members of the Tren de Aragua gang.