Fengzi I would have to say not likely. The only way Bush could get us into an actual war with Iran would be if Ahmadinejad were to do something so heinous that not only would the Dems not object, but most likely neither would the rest of the world.
Thats the only worry. Cheney has been pushing for a military strike on Iran, but no one in their right mind would authorize a premptive war. But what would happen IF during the latest round of saber rattling something were to happen. Something like the Gulf of Tonkin.

An attack on the US military would have to be met with a strong response. And THAT is what worries me.