During the current democratic presidency, and whether it can be justifiably blamed or not, we've seen:

- Housing bubble burst and destroy the assets of tens of millions of Americans;

- Private health insurance costs increase 100% [0] as the administration bungled the implementation of the solution to those incredible cost increases;

- College tuition costs increase 50% [1];

So if you're the 2-income family and over the last 8 years, while your kids became college age, you've seen health insurance and tuition skyrocket.

If you took a second mortgage in 2007, you lost it all by 2009 and had a high probability of being wiped out as the stock markets went on a tear over the next 6 years. You had to watch from the sidelines.

If you're blue collar, there's a high probability you were unemployed and possibly laid off more than once.

That's a lot of people with recent, seriously adverse, major life circumstances who need to point the finger somewhere. They are hurt and angry enough to rally around a candidate who curses the incumbents to their face.

[0] http://blogs.wsj.com/washwire/2015/04/16/public-vs-private-h...

[1] http://www.usnews.com/education/best-colleges/paying-for-col...