The New York Times has a report on various Senate races that indicates that Dems have a good chance of reelection in several swing states, due to Rethug in-fighting or incompetence. The in-fighting, of course, is between corporate/establishment Rethugs and teabagger extremists. As we saw in 2010, when the Rethug Senate candidate is a far right nutcase (e.g., Sharron "Right" Angle, Christine "Witchy Woman" O'Donnell, etc.), the Rethugs lose.
So we hope that the Rethugs continue to veer off to the far right, nominate unelectable candidates who voice extreme positions, and go down to a solid defeat.