Republicans are seriously considering a Doomsday Plan if fiscal cliff talks collapse entirely. It’s quite simple: House Republicans would allow a vote on extending the Bush middle class tax cuts (the bill passed in August by the Senate) and offer the President nothing more: no extension of the debt ceiling, nothing on unemployment, nothing on closing loopholes. …

Two senior Republican elected officials tell me this doomsday plan is becoming the most likely scenario. A top GOP House leadership aide confirms the plan is under consideration, but says Speaker Boehner has made no decision on whether to pursue it.

Under one variation of this Doomsday Plan, House Republicans would allow a vote on extending only the middle class tax cuts and Republicans, to express disapproval at the failure to extend all tax cuts, would vote “present” on the bill, allowing it to pass entirely on Democratic votes.