Well, in my previous post 5 months ago I called the election for Trump, and here we are having our very own Brexit moment. I expect that the media will spend a lot of coverage time today on the question 'how could this have possibly happened?' Allow me to explain in a sentence:
Working and lower middle class America just gave the establishment the finger.
Much like any other instance of using an obscene gesture it is highly unlikely to do anything positive except give a very fleeting sense of satisfaction to the person making the gesture, but that usually doesn't stop people.