The beginning of the president's speech wasn't good, and was marked by the sonorous banalities on which White House staffs in times of crisis always insist. "We join you in your grief," "We mourn with you for the fallen," "a quintessentially American scene . . . shattered by a gunman's bullets." Modern presidents sometimes speak as if their words were crafted by producers for a TV newsmagazine like "Dateline." This is bad because television producers tend to think their audience is composed of people who require the plonkingly obvious to be repeatedly stated in the purplest prose. The trend should...