There is general discontent with politicians in America due to the fact that many remain unemployed, underpaid, whatever.
While Obama still has basically 50/50 approval rating, however, across party lines.. Congress's approval rating is at something like 9 percent. Most educated voters know the real reason America has become so backwards, and ineffectual at creating any forward movement, bold changes, or anything. Because of the fact that Congress is absolute trash, and the Republicans are pretty much completely responsible for delaying or blocking any sort of legislation that could help the country whenever they are able to, to hurt Obama politically.
Republican leadership admit they would rather the economy suffers so Obama loses reelectoin, then to actually work together to get Americans working again. So, low information voters see the effects of these games and put the blame on Obama, when he's actually been pretty good at most aspects of leadership, except his ability to outmanoeuvre Republicans in Congress. Hopefully not only does Obama get another term, but Republicans are kicked the fuck out of the house. I'd rather see the Department of Education not get completely removed in order to lower taxes on billionares, for example (this is what Republicans want, to remove all public education in order to give tax breaks to billionares, not even propaganda here, its their entire agenda)