President Obama and First Lady Michelle Obama observed a moment of silence yesterday to honor the victims  of the Arizona tragedy. (PHOTO CREDIT: JEWEL SAMAD/AFP/Getty Images) FROM CNN's Jack Cafferty: It is the nature of events that confront our leaders that often serve to define them. In the wake of the Tucson massacre, President Obama … Continue reading What can Pres. Obama say in Tucson to ease the pain?