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.

Following the shooting death of Charlie Kirk, President Trump blamed rhetoric from "radical Left." Reports show right-wing extremists kill more Americans

To try and make sense of this moment, POLITICO Magazine reached out to a range of political violence experts at home and abroad. They explained what has fueled this type of bloodshed throughout history,