I will lay a substantial portion of the blame for a nuclear Iran at the left's doorstep. Their unpatriotic and anti-American caterwauling (and by "caterwauling" I mean "lies") about the Iraq campaign have effectively tied Bush's hands on how to deal with Iran.
That said, ultimately, Bush will have to decide whether armed confrontation with Iran to take out their nuke capacity is worth the risk and downside. He may have to decide to take the domestic political heat in order to spare the world another North Korea, except this one run by fanatics that expect an afterlife rich with virgins, etc. just for killing infidels. At least the Norks think they need to stay alive to reap the benefits of their perfidy.
Well-said.