Why Republicans Should Be Worried

They seem to be pretty confident following Scott Brown's win in Massachusets. But Daniel Larison writes:

If there is one thing from the last week that should deeply discourage Republicans, it is the realization that for all of the real successes in New Jersey, Virginia and Massachusetts, their party in Congress is still led by the same people who presided over two very large consecutive electoral defeats, most of those leaders were complicit in the bailouts their constituents hate, and these leaders continue to have no correct understanding of why they were voted out of the majority.