"The biggest single difference between the debates this year and four years ago is that President Bush cannot simply make promises. He has a record. And I hope that voters will recall the last time Mr. Bush stood on stage for a presidential debate. If elected, he said, he would support allowing Americans to buy prescription drugs from Canada. He promised that his tax cuts would create millions of new jobs. He vowed to end partisan bickering in Washington. Above all, he pledged that if he put American troops into combat: "The force must be strong enough so that the mission can be accomplished. And the exit strategy needs to be well defined."
-- Al Gore, writing in the New York Times
I think that this debate will be definitive one way or another.