Max Boot in “The Corrosion of Conservatism: Why I Left the Right”:

“No, not all Trump supporters are racist. But virtually all racists, it seems, are Trump supporters. And all Trump supporters implicitly condone his blatant prejudice. At the very least they don’t consider racism to be a reason to turn against the president. For a disturbingly large number of Trump voters, it is the primary reason to support him.”