Your chart of the day comes from K-Drum:
As you can see here, the percentage of high school graduates not in college from before 2008 found that about a third were unemployed on average. In the last three years, it's 53%. The big change is the difference in full time: employment there has dropped dramatically as the economy wound down, and the difference in unemployment as a result is staggering. 36% of high school graduates found a solid full time job before the crisis. Now that number is less than half that.
So yes, working class voters are pretty pissed off, and they are going to take it out on the guy in charge.