A memorial for Charlie Kirk has been set up outside Turning Point headquarters in Phoenix.

Kirk was assassinated Wednesday while speaking about social issues at a Utah Valley University campus courtyard.

The circumstances brought renewed attention to the escalating threat of political violence in the United States that in the last several years has cut across the ideological spectrum.

The killing drew bipartisan condemnation, but a national reckoning over ways to prevent political grievances from manifesting as deadly violence seemed elusive.