It won't come to that. Putin and Russia have already won in Ukraine. The Dear Leader and John Kerry are not in Putin's league. That was clearly shown on Syria. Putin is a Master Chess player. At best, the Dear Leader and John Kerry are mediocre Checker players. An inexperienced Community Organizer does not a good President make.
The Ukranian Naval Commander just announced that he was putting the entire Ukranian navy, however and whatever it is, at the disposal of Russia. Ukraine mobilises army as West warns Russia
There is nothing obama can do when a majority of Ukranians want an alliance with Russia. The EU can put all the puppets it wants into the presidency and the Ukranians will vote them out (like they did last time) as soon as they get the opportunity to do so.
Yes, Putin is a master international political chess master. obama is still playing air guitar in his bedroom, and John Kerry is playing air drums to accompany him.