But even if we had no missile treaties of any kind, the likelihood that [Barack Obama] would ever use nukes remains close to zero. I think pretty much everyone around the world knows that about him. And whether this treaty is ratified or not, that will remain the case until he leaves office.
Only a sociopath would have a likelihood higher than "close to zero" of actually using nukes. As long as it's not actually zero, deterrent is in place. Beyond that, you have to be nuts if you're looking for an opportunity to push the big red button.