Kevin, my take from the beginning of this has been that we need to build NATO back up and work on getting the Euros off Russian gas and coal and onto ours. Right now we can use the time this is buying to get organized. There is a pattern in the leadership of the US, and Western Europe, of doing stuff both unplanned and slow, the worst of both worlds.
Getting NATO built up again will take time. Running into the Ukraine half cocked would be a disaster. If we do anything, it should be getting weapons, etc. from other former Eastern Bloc type nations (Anti Tank missiles, etc.) and supplying the Ukrainians with them quietly, to deter the Russians from pushing in father than they already have. Direct involvement wouldn't be smart in my opinion, but I could see this bunch blundering in by doing something that was both ill advised and done with insufficient force to be effective.
Kerry is the last person I would have picked as Secretary of State, of course. In the first Peace Talks he ever participated in, he was working for the other side.