The Trump administration returned to the Supreme Court on Monday to ask the justices to reverse a lower court order that has blocked mass firings and major reorganizations at federal agencies, a case that could have enormous implications for the president’s power to reshape the federal government.

The U.S. Supreme Court has acted in a series of cases involving challenges to executive orders signed by President Donald Trump and actions by his administration since he returned to office in January.

Live updates and the latest news on the Trump administration live updates as Congress returns to Republican agenda bill and the Supreme Court enters its busiest month for rulings.