Tyler Robinson, the 22 year-old suspect in the assassination of right-wing US political activist Charlie Kirk has been charged, including with aggravated murder. 

But while America is accustomed to political assassinations, the response since the shooting has been out of the ordinary. 

Today, long time US historian, Dan Carter on what’s unfolded since Charlie Kirk’s death and why the uptick in political violence began well before Trump entered the White House.

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Dan Carter, American historian, author and University of South Carolina Professor emeritus