As President Donald Trump mounts an unprecedented campaign to control the Federal Reserve, the U.S. Supreme Court on Wednesday is considering the scope of a major check on his ability to remove a member of the Fed for any reason.

President Trump’s bid to control the Federal Reserve will be tested Wednesday at the Supreme Court, as the justices hear arguments on whether he can fire one of its leaders.

But Cook will tell the court the Federal Reserve was created by Congress in 1913 as a wholly independent entity, to insulate it from political influence, and from any one president "stacking the deck"...