The Supreme Court on Friday dashed President Donald Trump’s plan to immediately fire the head of an independent agency that investigates whistleblower claims, allowing Hampton Dellinger to remain in the job through at least the middle of next week.

The justices deferred ruling, for now, on the first test of executive power to reach the high court during Donald Trump’s second term.

The U.S. Supreme Court on Friday handed President Donald Trump at least a temporary loss when the justices declined to hear an emergency appeal to fire the leader of an independent watchdog agency.