So you're angry at the congressional Democrats. Perhaps you're furious with President Obama!
For godsakes, don't take it out on your local races. That's where change start. Find the more "Democratic" of the Democrats running in primaries and vote for them. Support local Democrats who walk the walk and talk the talk.
Change is going to have to start from the bottom.
Donna Edwards is a prime example. Donna represents the 4th district here in Maryland. In 2006, she took on veteran and entrenched corporatist Democrat, Al Wynn, and lost that election by an incredibly slim margin. If a few more people had turned out to vote--only a few thousand--Donna Edwards would have won. Well, guess what? Donna returned in 2008 amid the Obama-Democratic wave and destroyed Al Wynn in the primary. She worked hard and built a grassroots organization. And we worked our asses off for her as well. Her Republican challenger, Peter James, was incredibly weak. Of course, her district is over 90% Democratic, anyway.
Bottom line is that we cannot give up. Let fighters like Donna Edwards provide the anecdote to a broken Congress:
http://en.wikipedia.org/wiki/Donna_Edwards