In this Oct. 17, 2000 file photo, Republican presidential candidate, Texas Gov. George W. Bush, left, speaks as Democratic presidential candidate Vice President Al Gore watches during their third and final debate at Washington University in St. Louis. Al Gore's endless sighing during a 2000 debate against George W. Bush sparked endless mockery, as did his decision to leave his lectern and approach within inches of Bush during a response. Four years later, debate organizers would amend the event's rules to avoid such an episode, stipulating, "Each candidate may move about in a predesignated area."