The Trump administration took the case to the Supreme Court after an appeals court prevented the president from firing Hampton Dellinger, the head of the Office of Special Counsel.

It took less than a month for a case from Donald Trump’s second presidential term to reach the Supreme Court. The administration’s appeal stems from Trump’s attempt to fire a top government watchdog in a dispute that implicates longstanding precedent that protects independent federal agencies.

The Supreme Court has temporarily kept on the job the head of the federal agency that protects government whistleblowers.