Of course, I'm still playing for a team here. Broadly, it's the left, and more specifically it is the policy of a sane left. Not a compromising, mid-90s centrist left, but a left that is both self-assured in the correctness of its view while not being overbearing about it. It is nice to see these sentiments echoed in an analysis of Obama:
Democratic partisans think the enemy is vicious and must be met with uncompromising force. That's exactly how conservative foreign policy hawks feel about the world. Unsurprisingly, the right-wing foreign policy critique of Obama today sounds eerily like the partisan Democratic critique of Obama during the primary...The full article is here, and is about 10 paragraphs. Well worth reading, and a welcome break from the angry echo chamber that is most politics on the internet.
This is a perfect summation of Obama's strategy. It does not presuppose that his adversaries are people of goodwill who can be reasoned with. Rather, it assumes that, by demonstrating his own goodwill and interest in accord, Obama can win over a portion of his adversaries' constituents as well as third parties. Obama thinks he can move moderate Muslim opinion, pressure bad actors like Iran to negotiate, and, if Iran fails to comply, encourage other countries to isolate it. The strategy works whether or not Iran makes a reasonable agreement.