Meaningless to USA, of top level importance to Russia.
It would guarantee an invasion, which would be successful. See UK guarantee to Poland 1939.
Let's go, Brandon.
Yes. Any ruler of the Rus, be he Kagan, Prince, Czar, General Secretary, or whatever title Putin has this week, is absolutely willing to risk, and possibly willing to start, a war, to keep Kiev and the Little Russians from becoming part of a hostile European military alliance. That is a fact, upon which legality, fairness or justice have no bearing. The USA needs to understand that before it decides to act.
I certainly agree that no one has made the case that the USA should risk war to add Ukraine to NATO. And the administration that LESS THAN 90 DAYS AGO walked away from military conflict with THE TALIBAN should assume that Putin will assume they are bluffing.