The U.S. Court of Appeals for the 5th Circuit is considering whether the president properly invoked the Alien Enemies Act to deport alleged gang members.

MORE: 2nd judge rules Trump's use of Alien Enemies Act for deportations is unlawful. In the multiple lawsuits the ACLU has helped bring against Trump's use of the AEA, the group h

At issue is Trump’s invocation of the 18th-century law in March to remove noncitizens labeled as members of the Venezuelan gang Tren de Aragua. In his order, Trump proclaimed Tren de Aragua members were “perpetrating,