President Donald Trump’s purge at independent agencies is putting a target on a nearly 100-year-old Supreme Court precedent that protects certain officials from the political whims of the White House.

Supreme Court Justice Sonia Sotomayor said Tuesday that court decisions “stand whether one particular person chooses to abide by them or not,” days after two of President Donald Trump’s top lieutenants attacked rulings that halted some of his contentious executive orders.

President Trump’s first term was marked by significant defeats — and some wins — at the highest court in the country.