Due to the dire state of the U.S. economy, with millions of people out of work and losing their homes to foreclosure, Americans feel their elected politicians have failed them and seek to clean house. It's hard when a person works very hard, then loses their job and home. It is unjust and un-American. 

U.S. House Speaker Nancy Pelosi's song and dance not helping Democrats in the polls

One has to wonder, did incumbent politicians really do the best they could or was it status quo. When a long term senator, such as Arlen Specter, doesn't even make it out of the primaries, after working 44-years in Congress, one has to think Americans are fed up with the government on the whole. It also explains the Tea Party's rapid rise to the forefront of America's political landscape. 

Tea Party queen, Sarah Palin, took them mainstream

As much as President Obama says he is sympathetic to suffering Americans, his policies have failed. He needs to admit that, if only to himself and make a change. When Americans voted for "change" under Obama, the nation didn't mean change in their pockets.