Obama offers words of comfort at Arizona shooting memorial

Presidents throughout history have had to deliver speeches in the wake of tragedy to comfort the nation. Ronald Reagan did so after the Challenger explosion; Bill Clinton after the Oklahoma City bombing and Columbine shootings; and George W. Bush after 9/11, Hurricane Katrina, and the Virginia Tech shootings. President Obama is set to deliver his own speech tonight in Arizona to try and comfort a nation following the shooting of twenty people, that left six dead. How will President Obama approach the events, and their political impliations, from the scene of the tragedy?

Edward Widmer, a former speech writer for President Bill Clinton, and a historian at Brown University; and Kathleen Hall Jamieson, a professor of communication at the Annenberg School for Communication, tell us how Obama goes about writing and delivering such an important speech.