Obama's more likely to confront Iran militarily than Romney is

But Romney would face several critical challenges in a conflict with Iran that Obama would not:

— Romney would be a new president in 2013, which could plausibly be the year for a preventive attack. He will be inexperienced, and his national security team will be new and potentially inexperienced as well. The learning curve on Iran is steep, and the Iranian regime knows it. The Obama team is deeply knowledgeable, appropriately cynical about Iranian intentions, and has had the time and confidence to make course corrections.

— Romney, by all accounts, is uninterested in inheriting the mantle of President George W. Bush, who invaded two Muslim countries and lost popularity and credibility as a result. Romney, despite his rhetoric, is more of a pragmatist than Bush, and far more cautious. An attack on Iran is an incautious act, one that even Bush rejected.

— The unilateral use of force in the Middle East for a liberal Democrat like Obama is a credential; for a conservative Republican like Romney, it could be an albatross.