Hillary's loss was the product of complacency (rosy forecasts/polls that made Trump's loss seem inevitable likely discourage some from voting & encourage others to protest ballot). This is true nationally & in the critical swing states. Protest balloting 5Xs higher than '12, '08. 
BTW: states that broke for Sanders in the primary had significantly higher rates of defection than states that broke for Clinton, even controlling for % non-white pop. The Clinton team went full persuasion- which made sense given that for the 1st time EVER Clinton (the D) sweeped
the newspaper endorsements. Yet, in the end, she got beat among Indies pretty much everywhere. In 2020 the electorate will not be complacent and Indies will likely break in favor of the out party (Ds) via combo of "change" swing voters & turnout increases of left leaners.
You can learn lots of other cool stuff about 2016 via my book. Let me know if you have $ access issues amazon.com/Unprecedented-…
