The shadowy right wing group American Future Fund is going out with this ad in wavering Democrats' districts:
Basically, they are running the Democratic culture of corruption campaign of 2006. And since it is a nice familiar riff, most people will just apply it to the Democrats without missing a beat, and believe even more fervently that the government is crooked. This is what comes of running campaigns based not on ideology but on Washington culture." The criticism can just as easily be turned against you and since you've done all the work of pounding the message to the voters, it doesn't even cost them much to do it.
American Future campaign is an interesting group. They emerged out of Iowa featuring some longtime right wing groups, some Mitt Romney staffers and the wonderful folks who brought you Willie Brown. Since then they have been running tough ads all over the place, spending a lot of money. But I can't find that anyone's done much research into who's really backing them, a t least not recently.