Iran is threatening to close the Strait of Homuz, cutting off needed oil. Hawks will rattle their sabors as a gift of war-justification is presented in timely fashion. What better holiday gift than Iran asking for a military strike? Then while we're at it, we can bomb their nukes. Nah, not now boys -- settle down.
I doubt Iran is serious. This could be a gift for Obama, though, if he plays his cards right and is not the fanatic environmentalist he wants his green supporters to believe. In two months Obama will have to make a decision on the Keystone pipeline, and the Iran situation gives him a way to approve the pipeline. We can't depend on Iran not acting insanely, Obama can say, so out of necessity for short-term energy realities, he must approve the pipeline project. Obama can give his approval grudgingly and blame the crazy Iranian leaders, but who cares, as long he approves it.
Odds are that Obama wants to approve the pipeline, if for no other reason than to prevent union displeasure, and this is a very good rationalization to do so.