I agree that Bush is not as much of a dope as he is frequently portrayed, but that doesn't make him a genius, either. The U.S. obviously stumbled into a pretty bad situation when it invaded Iraq, and there is some movement to compounding the error further by getting involved in Iran. But that's quite a ways from WW-III. To have a world war, there have to be two sides with at least some semblance of parity. Who are you nominating as the opposing side? The Russians? The Chinese? The French?

I think you overestimate the compliance that would be required by Congress to get an invasion--or bombing, or nuking--of Iran. Bush would have a revolt not only of Democrats but of many Republicans if he tried it...