Sessions may very well weather this storm, because all he has to do is not quit, whereas Trump has to affirmatively fire him against the advice (if you believe what you hear) of his White House advisers, and despite opposition from Republican senators, conservative activists, and media loyalists, and at the risk of causing a crisis at the DOJ and within his party. Trump can keep on pounding Sessions — there was another Twitter blast this morning — but if Trump doesn’t actually take the leap and do something about it, all the attacks and criticism will start to make him look weak and indecisive. In which case, he’ll need to move on to the next thing, having succeeded only in diminishing his attorney general and himself.