Obama has explicitly rejected containment, which in this context makes it clear that there can be no scenario in which Iran has nuclear weapons but their use is deterred by early-warning stations, the threat of American or Israeli attack, and defensive measures.
We are now on the road to war. That’s what is important, not whether Obama gained votes or whether he is sincere or at precisely what second U.S. policymakers decide Iran has met the conditions for getting bombed.
This is huge and it is an unprecedented U.S. position that can be summarized as follows: Iran gets nukes. Boom!