"I hear there's rumors on the Internets!"
Runner up (regarding his plan for Iraq):
"Liberty can change habits."
"When a drug comes in from Canada, I wanna make sure it cures ya, not kill ya. ... And what my worry is is that, you know, it looks like it's from Canada, and it might be from a Third World."
(Ouch. War Room concedes that Ontario has probably now shifted from battleground state decisively into the Kerry column.)
UPDATE: Honorable mention, runner-up (regarding his differences with Kerry on economic policy):
"We've got battling green eye shades."
(War Room is impressed, and is scrambling for an antiquarian dictionary... )
UPDATE 2: Honorable mention, second runner-up (responding to "In a second term, who would you name to the Supreme Court and why?"):
I'm not tellin'!