I think "dropping the ball" should be Kerry's answer to the "flip flop" charge.
Bush dropped the ball when he let bin Laden get away at Tora Bora.
Bush dropped the ball when he passed on a Pentagon plan to kill Zarqawi.
Bush dropped the ball when he actually slowed down the pace for securing loose nukes in Russia.
Bush dropped the ball when he didn't plan for what would happen after we won in Iraq.
Bush dropped the ball when he sent troops to guard the oil ministry in Iraq, but not nuclear sites.
Bush dropped the ball when decided to cut funding for first responders.
Bush dropped the ball when he resisted the 9/11 commissions recommendations for reforming the intelligence community.
Bush dropped the ball when he let North Korea and Iran make progress in acquiring nuclear technology and weapons.
Anything else?
We need to send a consistent message that says Bush is someone who means well, but is just no match for the job at hand. Repeating Drudge's claim that he was exhuasted and drained might help too.