The case raises fundamental questions about the power and transparency of an entity that has slashed agency budgets and government employees with unusual speed and that has inspired a wave of federal lawsuits against the Trump administration.

The Supreme Court on Friday stayed a lower court order that blocked the Trump administration from deporting roughly 500,000 migrants from Cuba, Nicaragua, and Venezuela.

Justice Jackson wrote that the court's order would "have the lives of half a million migrants unravel all around us before the courts decide their legal claims".