I don't think so, my guts tell me the American Public is on a hair trigger and will have no problem pulling it contrary to the whinning lib's in the press.
Proof is in the fact that the Left has not landed a punch on the President in almost six years.
Don't get me wrong, GWB isn't bashful.
But the EU or the UN is not going to back any kind of military action at all and Iran is too far away for Israel to strike effectively.
I do disagree about the public backing another war at this time. The Senate and Congress would not authorize it unless we were directly threatened, and it will be years before Iran has ICBMs.
I don't think it is on the President's agenda either, or instead of 160,000 troops in Iraq, we would have 460,000.
Armed conflict with Iran will have to wait until the next President. It will happen eventually though.