I'm not sure this accurately conveys the situation. American voters have been dissatisfied with the lesser of two evils choice foisted upon them every 4 years for decades. We're 75 years into endless wars. Massive numbers of union high paying jobs have been shipped overseas since the 80s hollowing out the middle and working class.
One could easily see the votes as being more anti-establishment than anything else.
edit: I love how people downvote comments they don't like in political discussions, even when they're just attempting to foster understanding by sharing a perspective, and not prescriptive or pejorative in any way.