What Radicalized Suspect in Kirk Killing?

With Tyler Robinson, the suspect in the shooting of right-wing political activist Charlie Kirk, due to appear in court Tuesday, investigators are pointing to “dark internet” culture as a factor that potentially radicalized him. Meanwhile, Donald Trump and his supporters are calling for a crackdown on political opposition. David Frum was a speechwriter for George W. Bush, who now analyzes politics and culture as a staff writer at The Atlantic.  He joins the show to discuss.

Also on today's show:  Journalist & filmmaker Petra Costa; Susan Mayne, former director of the FDA's Center for Food Safety and Applied Nutrition 

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