A judge will hear arguments Thursday over whether the Trump administration defied a court order when they deported alleged migrant gang members to El Salvador.

A U.S. judge will hold a hearing over whether the Trump administration violated his order temporarily blocking the deportation of alleged Venezuelan gang members under a rarely-invoked 18th century law.

U.S. District Court Judge James Boasberg won’t lift his earlier ban on the deportation of immigrants under the Alien Enemies Act, denying a Trump administration request and ruling it likely violated the due process rights of migrants who were deported to El Salvador.