Per the Washington Monthly:
MCCONNELL BREAKS WITH BOEHNER, WILL FIGHT MIDDLE-CLASS TAX BREAKS.... House Minority Leader John Boehner (R-Ohio) is reluctantly willing to go along with President Obama's tax-cut policy yesterday. Might the Senate GOP leadership go along? Not so much.
Senate Republicans will oppose any effort to renew soon-to-expire Bush administration tax cuts if upper income taxpayers are excluded from the reductions.
A spokesman for Senate GOP Leader Mitch McConnell said Monday that every Senate Republican has pledged to oppose President Barack Obama's tax-cutting plan. [...]
McConnell has said a bill extending the tax cuts for only low- and middle-income earners cannot pass the Senate. Forty-one senators can block a bill with a filibuster, but McConnell spokesman Don Stewart declined to say whether all 41 Republicans would support a filibuster.