President Donald Trump’s call for the “termination” of Federal Reserve Chair Jerome Powell landed Thursday as the Supreme Court is weighing a fast-moving appeal over two independent agencies that has increasingly become a proxy battle for control of the nation’s powerful central bank.

The early-morning order temporarily blocks the administration’s attempt to use the Alien Enemies Act to remove a group of Venezuelan migrants.

The Trump administration had asked the justices to lift a nationwide pause on the policy as lower court challenges continue.