Anyone want to take a stab at this?
President Romney would be all talk, no action in this situation. What the hell else can he or ANY American president do about the Ukraine? Right this moment, the US/NATO position in Afghanistan is logistically dependent upon an incredibly long and complex line of communications which runs right through Russia and is highly dependent upon co-operation from the Russians to function. That LOC is called the Northern Distribution Network. No one in the Pentagon is going to advocate any sort of military adventurism in this crisis as long as they need Russian help to supply their forces in Afghanistan. Pity about that, really, but that's the way the cookie crumbles.