Here are some articles that address the relationship between violent political rhetoric and violent actions:
"Tucson Rampage Casts Light on Toxic Political Tone"
"Bloodshed in Arizona Casts New Light on Vitriol in Politics"
"In the Shock of the Moment, the Political Bickering Stops...Until It Doesn't"
New York Times Room for Debate: Assassins and American History
"Beck Channels Palin on Tucson Shooting"
"In Defense of Inflamed Rhetoric"
"Sometimes a Tragedy Is Just a Tragedy"
