Polling Donald Trump is one of the most difficult and confusing exercises in modern politics. In Trump, we have a guy who won the presidency by surprisingly beating the polls in key Rust Belt states, of course. We also have a guy who maintains the loyalty of his base despite major flaws that this base readily acknowledges. As I wrote in June 2016, nearly half of Trump supporters - 46 percent - said one or more of the following: He had made a racist comment, was prejudiced and/or was unqualified to be president. Not half of all voters; half of his supporters.