You would expect that Bill and Hillary Clinton, of all people, would understand the importance of last impressions. After all, theirs has been the most superficial, image-conscious, poll-driven, photo-op presidency of all time. The contrived images of the Clinton years are indelible: their hand-in-hand waddle on the beach; Bill walking from church carrying a bible the size of a cereal box, the words "Holy Bible" pointed outward for everyone to see, as if in a commercial; Hillary's frilly pink press conference on Whitewater, where she mimicked the pose struck by Abe Lincoln in the portrait behind her, suggesting that she...