In 2016, which party is a member of the KKK likely to support?

You know there are YouGov polls of both candidates supporters about those supporters views on various topics. As it happens, something like 15% of Trump supporters think Whites are the superior race and another 20% aren't sure whether or not they agree, so they can't bring themselves to reject that sort of bigotry out of hand. So yes, Trump is the choice of white supremacists. This is only mysterious if one is deeply committed to self-deluding mental gymnastics.