Venezuelan gang members were deported from the U.S. under the Trump administration amid a judge issuing a court order against it. NBC News' Danny Cevallos breaks down the legality of the deportations used with the Alien Enemies Act.

A U.S. judge on Monday ordered Trump administration officials to explain whether the administration violated his order when they deported hundreds of Venezuelan gang members over the weekend and potentially set up a constitutional clash between the president and the federal judiciary.

The Trump administration has deported hundreds of alleged Venezuelan gang members to El Salvador under a rarely used wartime law, bypassing normal immigration procedures and possibly defying a federal judge's temporary ban on the move.