Crimea has to stay in Russian hands because of the access to Sevastopol and the new Kerch Striat bridge.
we could negotiate with removing the sanctions, in rerturn for ending the war in Donbass.
However negotiations are already taking place. Normandy Format talks
https://www.atlanticcouncil.org/blo...scalation-dampens-hopes-for-peace-in-ukraine/
But we are way down the road. US/Russian relations can maybe get back to one of more cooperation
but it's going to take a pullback from NATO -and the eastern European States will squeal like a stuck pig if we do.
Trump has to cut thru all this,and the US Congress and bureaucrats will give him a gard time about it