The Alien Enemies Act of 1798 gives the president wartime powers to deport undocumented immigrants with little to no due process.

Judge James Boasberg started off the hearing by telling Deputy Assistant Attorney General Drew Ensign that, in filings over the course of this week, there had been “disrespectful, intemperate language” of a sort he had “never seen from the United States.”

A Justice Department attorney was grilled at a court hearing about whether the government willfully defied an order to return deportation flights to the United States.