Kirk's slaying adds to a growing list of political violence. Two Democratic Minnesota state lawmakers and their spouses were fatally shot in June.

Founder of Turning Point USA was shot at a university event, an act that has been condemned by leaders across the political spectrum.

Kirk, an influential Trump ally who at age 18 set up Turning Point USA, died in a shooting while speaking at a Utah campus event.

Turning Point USA founder was fatally shot in front of a large crowd at Utah Valley University