CHARLESTON, SOUTH CAROLINA—On Friday, the last full day before the South Carolina Republican primary, most of the candidates—including Donald Trump, Ted Cruz, Marco Rubio and John Kasich—hosted rallies in the Charleston area. Their messages ranged from the overtly religious to the outright insane, but their audiences were astoundingly similar.
Charleston, according to the 2014 census, is almost 30 percent African American.
