SCOTUS essentially ruled that Trump can assassinate his political enemies, legally, as an official act. I understand that hasnt actually been legally challenged and their ruling was somewhat vague, but that really is the gist of it. He can commit crimes as official acts and enjoys blanket immunity. So if SCOTUS now opposes him, theres a non-zero chance he has the ones who rule against him removed and easily nominated and installs new sycophants which will do his bidding.