An extraordinary legal showdown took place last weekend over President Donald Trump’s invocation of an 18th century wartime act to deport hundreds of immigrants, most of them Venezuelans, to a prison in El Salvador.

Administration officials said they expect the fight over using the wartime act to ultimately head to the Supreme Court.

Trump officials said the deportations don’t violate a judge’s order barring use of the Alien Enemies Act for removals -- but also questioned the order’s validity.