The fact that the United States has not been attacked since Sept. 11, 2001, far exceeds the most wishful expert predictions of the time. Perhaps facing another al Qaeda-led barrage would have reinforced our need for national unity, caused us to recognize the gravity of the Islamist threat and fortified Mr. Bush’s standing at home and abroad.

Yet, thankfully, that never happened. And Mr. Bush has been punished for this obvious success.