Putin doesn’t recognize Ukraine’s right to be an independent country. Any agreement on the lines that Trump suggests would have been temporary. Back when Ukraine gave up its nukes, Russia promised to respect the independence and territorial integrity of Ukraine (which included Crimea). Crimea and the occupied oblasts in eastern Ukraine all voted for Ukraine’s independence when Ukraine left the Soviet Union.
“Back when Ukraine gave up its nukes”
Ukraine never had control over nukes, end of discussion
So we should play world police to stop Putin, with bankrupt US Treasury? That is as stupid as it gets. We have no treaty obligations to defend Ukraine borders.