It wasn't the good people of the USA who elected Bush, it was the Republicans.
   He couldn't get the American people to support a war with Iran now even if it was advisable. After finding zero WMDs in Iraq he would be the "boy who cried wolf" when he starts talking about WMDs in Iran even though they well might be there. Our military is strained to the breaking point now and the American people, including a rising number of Republicans, are sick of war.
   This is just another on the long list of reasons we should have never attacked Iraq in the first place. If we meet a situation where we REALLY need to take military action (and I'm not saying that IS the case) we will be unready and unwilling to do so.