That you can’t conflate immunity from criminal prosecution with Constitutionally mandated separation of powers? They are not the same. Checks and balances are the foundation of our government and still exist today. The courts can still tell the Executive Branch, you can’t do that. The President simply can’t subsequently be charged with a crime for exceeding his authority.

Also the biggest beneficiary of yesterday’s ruling is not necessarily Donald Trump. If Presidents can face criminal indictment for official acts, former President Obama is absolutely liable for prosecution. Why? Because while in office, he authorized a drone strike on an American citizen without due process. And there’s no statute of limitations on homicide.