I thought Kerry showed some restraint to not pound on some of Bush's gaffes. I'm not sure why that was - perhaps he didn't feel like he needed to. Regardless, there were a few occasions where the President was left searching for answers, and he had to resort to the "It's hard work", _shrug_ combination.

Kerry also gave him enough rope to hang himself by allowing him to repeat ad infinitum the, "You cannot lead if you send mixed messages." line right until the end when he pointed out that certainty does not automatically make you right.