Josh Marshall at TPM put out this letter from an anonymous DC Democratic staffer, and you have to read it.
The money quote:
This is my life and I simply can't answer the fundamental question: "what do Democrats stand for?" Voters don't know, and we can't make the case, so they're reacting exactly as you'd expect (just as they did in 1994, 2000, and 2004). We either find the voice to answer that question and exercise the strongest majority and voter mandate we've had since Watergate, or we suffer a bloodbath in November. History shows we're likely to choose the latter.