Trump can’t back down. He has no other method of operation than application of further force to make his opponent yield.
You will do what I want, you’re making me do this. This is your fault I have to hurt you more. Anything you do in retaliation is your fault and not a justifiable reaction to what I’m doing to you and I will hurt you harder for everything you do to defend yourself.
He’s an abuser.
If he were to stop, that would mean losing face and the possibility be were wrong.
No narcissist can do that.