(CNN) - Apparently scrambling for votes on their alternative to a fiscal cliff deal - known as Plan B - House Republicans late Wednesday were considering expanding the scope of their tax cut extension measure to include spending cuts.
The measure, according to GOP sources, would be modified in an effort to win support from Republicans who were concerned the extension without spending cuts was a net tax increase. Plan B was initially advanced by House Speaker John Boehner as a method to ensure the GOP is not connected with a middle class tax increase if a fiscal cliff deal is not reached.
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One of the sources said the concept is helping with some members, but not others.
House Republican leaders met Wednesday evening to talk about whether and how to hold a spending cut vote.
The House was set to vote on two measures Thursday: Plan B, as well as a proposal with President Barack Obama original position that the Bush-era tax breaks be extended only on household income under $250,000.
The version of Obama's position was expected to fail in the Republican-controlled body.
But a House Republican leadership aide said there would not be a vote on the $250,000 measure since Obama had offered House Speaker John Boehner a deal which raised the threshold to $400,000.
There would be a second vote, a GOP aide said, on a measure that would replace defense cuts under the sequester with cuts elsewhere. The sequester measure, designed to be an incentive for action on the deficit, included equal cuts to discretionary and defense programs.
The White House on Wednesday threatened to veto the Boehner's Plan B proposal.