Trump is not putting pressure on Z. If Putin and Trump are right, Z has no authority, because he didn't allow elections. He is a dictator for the moment... completely against Democracy... no matter who started the war for what reason. Z simply doesn't have authority in Ukraine other than by force... like Hitler, by force. Working things out without hurting Ukraine any more, and without hurting Z is what Trump is trying to do.

The lands of Ukraine are wealthy enough in rare-earths and other things, that Ukraine can keep itself and simply pay off its debts. Z should be removed. NATO is protecting him. The answers aren't easy.