yeah sure makes me happy when the country with the largest nuclear stockpile is making threatining moves... 
they have more warheads.. technically, but in active service? able to deploy?
at any rate
you can totally take nukes off the table, putin is ex KGB, meaning hes a little bit crazy, but hes not a fool, nothing short of the US invading the soviet union and starting to take the country completely over would prompt them to initiate a nuclear exchange, because they know good and well they (nobody) could win, they would be utterly obliterated. nukes are a non factor.