Who decides? It was the principle at stake in 1868, and it’s essentially the same today. Is there one man, the President, who decides executive branch policy, or do others have a say as well?
The language of the Constitution is unequivocal. The President alone decides how to enforce the law. No one else.
When President Andrew Johnson fired Secretary of War Stanton, Congress challenged his authority to do so in the only way it could — he was impeached in 1868. If the Senate had convicted him, and removed him from office, the result would have been a form of parliamentary government, in which the legislature controlled the President, and the executive branch. Because he was acquitted, the Presidency, and the system designed by the Framers, was saved.
Today lawyers in the Department of Justice and the FBI think they have some authority independent of the President. It is a usurpation of power and a challenge to the Presidency. Not to Trump. To the office of President.
This challenge by a cabal of government lawyers to the power of the Presidency will end in their ignominious defeat. They can only win if Trump is impeached, convicted, and removed from office. That’s not going to happen, so the outcome of this contest is preordained. It’s just a question of how and when Trump chooses to end it.
Mueller has been given enough rope to hang himself, which he is in the process of doing. President Trump can put him out of his misery any time he chooses.
“You’re fired,” is Trump’s trademark phrase. To end this challenge to the Presidency, all he has to do is say it.