Did you know that, after Donald Trump won his surprise upset victory to become president in the 2016 general election, there was an almost identical reactionary result in elections held the following year? Both New Jersey and Virginia held state-wide elections in 2017, and Democrats swept those handily. In Virginia's 2017 gubernatorial race, Democrat Ralph Northam (then-Lt. Gov.) trounced former RNC chair Ed Gillespie 53.9% to 45% — a 9-point margin and the widest Democratic win in Virginia since 1985. (Recall also that the 1985 election was one year after President Ronald Reagan won re-election. In 1981, the year after...