1.) trumps way of ending the war would be to order ukraine to cede the land to russia; something he couldn't do outside of refusing to send them nato aid, cause it kinda requires ukraines cooperation... which, obviously, they will not. If they did cooperate; it will just end in consistent and frequent cedes over the threat of war from russia. 2.) if trump has a way to end the war RIGHT NOW, then he's a ******* monster for not trying, instead bragging about it and using that ability to his own benefit. Neither of those are things you want anywhere near the bottom echelons of power, never mind the upper ones.
Even if the RNC decides that this coming loss (and make no mistake, trump was going to lose election regardless of the debate; but he already lost it when he spouted that noise about immigrants eating pets.) is the end of trumpism... good luck with that. Trumps family is literally in charge of the organization. Unless they stage a coup, trump isn't going anywhere. When trump dies, his kinds will probably try to cash in on his "political dynasty" and they won't hug off either. They were INCHES away from the kind of power those psychopaths can only dream of: they aren't about to give up now.