he takes President Obama's call pretty seriously.
Here's the deal--I don't have to like Putin or what he's doing to acknowledge that levering his ass out of Ukraine isn't happening without a fight. I also don't have to buy into the idea that "The West" staged a coup (which is just bizarre to me, because did you see Yanukovych's pirate ship?) when Ukrainians had good reason to be aggrieved with their old leadership, to realize that there is an interest anywhere to be sure that people everywhere have a right to choose their government. And this point includes bigger countries not just taking over smaller countries just because. It's occasionally done, but it's not really a "done thing".
Getting back into a Cold War mentality seems unhelpful. Arming and "training" Ukraine (in what--reading the manuals of the arms we give them?) seems like the start of what could grow to a larger commitment. Also, if we did decide to go so far, what is the Russian response? I'm not saying the whole thing looks like War Games except for reals and with better computers, but yeah--
I don't want to "play a game". Everybody would do better taking a big step back.