If Israel can't or wont do it, we may have to learn to live with a nuclear Iran. I have already started trying to accept it. We may be able to put some sanctions on Iran and do some things to put pressure on the Iranian government through the dissidents in the Iranian public. I think Bush will do all he can short of military action. Doing that and also keeping his focus on Iraq and getting it cleaned up before he leaves office are about all I expect because the military option is very, very dicy for Bush to do.
President Bush will stop Iran from having a nuclear bomb, period. We will go to war with Iran next year, it will be a massive air campaign to destroy their nuclear facilities, and lot of their military infrastructures and command.