>> looking with an armed engagement between the united states and any nato country and russia is world war iii. and frankly, the ukrainians are not asking for american troops. they're asking that we continue to supply and equip them. and i'm not saying that this fight is over. i think the will to fight, which is one of the hardest things to measure, is extraordinary on the ukrainian side. there are real and growing questions about the morale and the technical capability of the russian forces. that said, if in fact putin is able to achieve, for example, a military victory, that doesn't mean he's won. because he'll face ukrainians that will fight him and carry that out. there will be a legitimate ukrainian government no matter what happens militarily on the ground. i still think there's open questions about how long and costly this is going to be from a military standpoint in ukraine. i think the costly war situation is probably his best case