He can say what ever he wants, apparently, but he has to run it by a court to actually prosecute people, and we’ve already seen that the courts are not just giving him the outcomes he wants.
Hell, even the Supreme Court, as stacked as it is, isn’t just rolling over for him.
The question is what happens when he continues to just ignore court orders and rulings. Will he be held in contempt? Will there be actions to enforce the decisions of the courts?
That’s the actual question at stake at this point