Right, so let's say Donny ends this - by giving in to Russian demands and giving them land concessions and blocking Ukraine from EU/Nato membership. How is that going to be seen in any way but a Western loss? How will this discourage Putin from going further? Already Georgia has a pro-Russian puppet government and brewing civic unrest, and have we already forgotten what happened there in 2008?
It's a shit sandwitch any way you slice it. Keep the war going, more people die. End the war, Putin gets a dub, the West gets an L on its record, while Putin starts another conflict and more people die. Those are your choices, folks, and I fail to see how the Very Stable Genius makes this any better.