Who knew David Duke mattered? Cable news made the former wizard of the KKK quite visible in Charlottesville, at what planners billed as the largest gathering of the "alt-right community." The "Unite the Right" rally encouraged the like-minded to go to and demonstrate in Charlottesville, Virginia. Counter-protesters, of course, showed up, and many violent clashes ensued. When the dust settled, a woman had been killed and 19 injured when a suspect apparently intentionally drove his car into a crowd of people, although the matter remains under investigation. Two police officers died when their patrol helicopter crashed. Duke got considerable airtime...