President Obama’s refusal to consider spending cuts during the upcoming debt ceiling debate and House Majority Leader Nancy Pelosi’s call for more taxes has top Republicans predicting stalemate and a chance of 50-50 or better of a government shutdown next month.

Top House leadership aides said that the GOP is mapping a plan to reject new taxes and demand a dollar-for-dollar spending cut for every added dollar of debt. “We will have all GOP members united with Speaker Boehner and the leadership,” said a House leadership advisor. “The president has gotten the last nickel of new tax for the remainder of his presidency.”