The Trump administration touched off a legal battle in March when it invoked the Alien Enemies Act to deport two planeloads of alleged migrant gang members to the CECOT mega-prison in El Salvador by arguing that Tren de Aragua is a "hybrid criminal state" that is invading the United States.

Judge Andrew Oldham, a Trump appointee, asked if there was any case law that shows you can “second-guess the president of the United States” when the commander in chief says

The case is likely to be the first to reach the Supreme Court on the substantive issue of the president’s invocation of a rarely used wartime law.