This was probably written for him ahead of time, but it's still funny. From Salon.com:
Kerry's best shot at narrowing the race will come in the presidential debates, which begin on Sept. 30 at the University of Miami. Letterman and Kerry joked about the negotiations that led to Monday's announcement of an agreement on debate scheduling and format. Kerry said the campaigns had argued over seating arrangements for the vice-presidential debate. "I wanted to have John Edwards stand," Kerry said. "Dick Cheney wanted to sit." Letterman asked about a possible compromise involving squatting. Kerry said that wasn't the deal. "Well, now what's gonna happen is, well, we compromised and now George Bush is gonna sit on Dick Cheney's lap."