A whopping 74% of Americans believe that Congress is contributing to the problems in this country (i.e., making them worse). Only 17% believe those in Congress are acting to solve the country's real problems. This should worry those currently serving in Congress -- especially since 63% of the survey's respondents don't think their own congressperson deserves to be re-elected (and only 29% think they do deserve re-election).
Some think the gerrymandering done in 2010 will protect members of Congress, and allow the Republicans to hang on to the House of Representatives. But there are a couple of problems with that view. First, you can't make every seat a safe one by gerrymandering. There are going to be some seats (for both parties normally) that are going to be competitive. Second, numbers like those in the charts above could indicate that an anti-incumbent wave is building up.
Since the Republicans currently control the House, they are the ones that could be hurt the most by an anti-incumbent wave of sentiment among voters. And the two charts below show that could well be the case. Note that the public has a significantly more negative opinion of the Republican Party (53%) than it does of the Democratic Party (40%). While the public is not thrilled with the Democrats, it is downright disgusted with the Republicans.