Last night's debate reaffirmed a fact that has been evident for several months now: a U.S. preventative war against Iran is almost inevitable barring a diplomatic breakthrough, no matter which candidate wins next month.
Both President Obama and Governor Romney said in no uncertain terms that Iran will not be allowed to have a nuclear weapon. Romney went further and said that Iran could not have "nuclear capability" - which is untenable since they are signatories to the NPT and are thus legally permitted to have a civilian nuclear program.
Thus we had the bizarre spectacle last night of President Obama hailing the fact that he has unwound two costly wars to focus on "nation building at home" while promising to start a new Middle East war - the costs of which go conveniently unmentioned. Romney, calling himself a man of peace, also indicated that he would start a war if Iran didn't change course, only he set the bar even lower.
At this stage, unless a negotiated settlement is reached or Iran backs down, the U.S. seems to be heading inexorably toward a military confrontation with Iran.