Adversity brings out the best in you: graciousness. And hey, you're gonna need it, especially when you come face to face with the biggest dullard on the planet. This will take some tact. Politely listen for a minute or two as the bore drones on about the latest foreign policies, all the while planning your escape. Introduce him or her to someone else, then make a break for it. Changing the subject will not work this time.