After prominent conservative activist Charlie Kirk was shot and killed during a university event in Utah, the political sphere erupted in concerns over growing political violence in the United States.

Political violence is hardly unprecedented in the United States. In fact, the country has “a long, dark history” of violence that has “struck the highest level of American politics,” said Kevin Boyle, a Northwestern University historian.

Political violence has targeted the political left and right and has been perpetrated by the left and the right. Here's a recap since 2011.

The slaying of the conservative influencer risks driving a divided nation even further apart.

The shooting death of Charlie Kirk puts a harsh new light on the worsening climate for political discourse on American college campuses.

NPR's Michel Martin speaks with Robert Pape, a professor of political science at the University of Chicago, about Americans' changing attitudes toward political violence.

President Donald Trump on Friday doubled down on blaming what he called the "radical left" for political violence in the United States after the killing of conservative activist Charlie Kirk. During an appearance on "Fox & Friends,