Impressionists, cartoonists, and even historians rely heavily on identifying and amplifying the physical and verbal idiosyncrasies of public figures, especially presidents. Their constant presence in the media means that their pet phrases and mannerisms become familiar to all (even against our will) as the inevitable caricatures demonstrate. There was Reagan's "Well..." and a shrug of the shoulders, GHWB41's slow-motion karate chops on the top of the lectern, Clinton's raised index finger, etc. Obama is a special case, however, as he rarely has anything to say of substance (or truth, if you like) beyond the verbal window dressing. His "Let me...