Impeachment is a POLITICAL process and NOT a criminal process.Nobody is speaking about being above the law. Trump was accused of incitement of insurrection by the House of Representatives and was acquitted of that crime by the Senate.
THAT is the proper process for dealing with a President who acts improperly (i.e. above the law). The President is going to make decisions every day that somebody will declare illegal, treasonous, acting 'above the law.' In the vast majority of the cases he likely is acting within his prerogative as President no matter how many people disagree with the action. For the rest, the power to hold him accountable for his actions is given to Congress and is given to no other.
That is how SCOTUS should rule.
No, it is not a substitute, it is not in the place of, our criminal justice system.
If a President commits a crime while in office, that was not in the commission of a presidential duty, he is not immune.
A campaign rally or protest or riot organized by a President's political Campaign, is NOT a Presidential duty.