The GOP establishment can't see the forest for the trees. In their determination to save at all costs one RINO who should have decided to retire they may antagonize enough conservatives in other states as to throw away a good chance to regain the Senate, which could make Obama's life much more difficult in 2015 and 2016.
The story of the next two years may be civil wars in both parties--between the Establishment/Wall Street wing of the Republican Party and the conservative/Tea Party wing, and between the Clintonistas and the Obama loyalists in the Democratic Party.