Does Ariz. shooting reflect state of political debate?

Gabrielle Giffords
Vera Rapcsak, foreground, and others hold up signs outside the office of U.S. Rep. Gabrielle Giffords, D-Ariz. in Tucson, Ariz. on Saturday, Jan. 8, 2011 after Giffords and others were shot outside a Safeway grocery store as she was meeting constituents. (AP Photo/Chris Morrison)
Chris Morrison/ASSOCIATED PRESS