WASHINGTON (AP) — The Supreme Court on Monday dramatically expanded presidential power, upholding President Donald Trump’s firings of the heads of independent federal agencies with one important exception, the Federal Reserve.

The justices allowed Fed governor Lisa Cook to stay in her job while she fights the Republican president’s effort to fire her over allegations of mortgage fraud, which she has denied.

But other than at the nation’s central bank, with its role of setting interest rates, the court held that presidents have free rein to fire agency heads at will, despite federal laws that require a cause for such dismissals and a 91-year-old decision that had limited executive authority. That decision, Humphrey’s Executor, was overturned.