How far should the war in Ukraine be escalated?

Should the United States continue to send billions of dollars worth of weaponry and support to Ukraine, or are we risking World War III? Should the U.S. or West attempt some kind of diplomatic solution at this point? Should the U.S. even be involved at all? What do you think is the likelihood that Putin will use nuclear weapons?

I’m interested in discussing the Russo-Ukrainian war, but not in the context of Elon Musk and Russian agents. Let’s just talk about where we think this war is going and to what extent the U.S. should be involved.