An interesting graph, via the Hotline's Steven Shepard, from this report (PDF). Buried in the new ABC/Washington Post poll (conducted by Abt-SRBI) that mostly focuses on the presidential race is this question:
Thinking about the next election in November 2012, right now, are you inclined to vote to re-elect your representative in Congress, or are you inclined to look around for someone else to vote for?
This question has been asked since 1989, and check this out (click for a larger version):
As you can see, this metric is at an all-time, two-decade high. Though we don't have access to the cross-tabs on this question, the author of the report, Gary Langer, says: "It’s up especially among Democrats, a possible sign they’re stirring as they did not in 2010." We can only hope.