Twenty-five years after its revolution of 1979, Iran has yet again become too big of a problem for Washington to play politics with. Fortunately, commencing his second-term, President George W. Bush is in a unique position of strength. On the one hand, he is less vulnerable to special interests in Washington seeking confrontation with Iran. On the other hand, his strong record on national security grants him enough political maneuverability to solve America's Persian puzzle once and for all by easing the increasingly costly and unsustainable policy of isolating Iran in return for an end to Iran's objectionable policies. President...