Articles of Impeachment
Nullification of all court decisions under Roberts
Force it all to be relitigated
Roberts court will be just behind the Taney court as most loathsome in history.
I'm being dead serious here, the decision to say that the President can just kill anyone and do a coup and become a dictator with unlimited power is probably worse than the Dred Scott decision.
It genuinely changes the entire governmental system from a democracy to a dictatorship.