The white nationalist movement in the United States is nothing new. Yet, prior to the 2017 "Unite the Right" rally in Charlottesville, Virginia, many Americans assumed that it existed only on the fringes of our political system, a dark cultural relic pushed out of the mainstream by the victories of the Civil Rights Movement. The events in Charlottesville made clear that we had underestimated the scale of the white nationalist movement; Donald Trump's...