I know he's windsurfing and hang-gliding, but I mean in the long run. He's only 57 -- that's young for an ex-POTUS. What do you do with yourself when you've been a politician most of your adult life, and your career has peaked so decisively that you have held the highest office in the land and can never hold it again? John Quincy Adams went back to Congress -- could Obama go back to the Senate? Or run for Mayor of Chicago or Governor of Illinois?