Back shortly after Germany was defeated in WWII, Winston Churchill went down in the greatest electoral defeat ever for a sitting Prime Minister. The lesson, a war leader is a person who guides his people through the hardest of times only to be seen as an unpleasant reminder of hard times after the crisis is over. So for anybody making accusations of "conveniet timing", would it not make a helluva lot more sense for Bush to continue sitting on Usama until after the election?
I'd certainly bet that more than the current lead of voters for Bush would head straight to John "Return to Normalcy" Kerry. Kind of like giving your Cy Young Award pitcher his walking papers. Thanks, kid, have a rest.