Idaho's Republican U.S. senators voted to block a budget deal as they joined a failed effort to keep the full Senate from considering the measure.
Along with 31 other Republican senators, Mike Crapo and James Risch sought unsuccessfully to filibuster the measure Tuesday.
However, it passed 67-33, likely setting up a final Senate vote on Wednesday afternoon.
If it passes scrutiny, the deal will mark a modest congressional accomplishment at the end of a year punctuated by a partial government shutdown, a near-default by the U.S. Treasury and broad congressional gridlock.
Only one Idaho lawmaker, U.S. Rep. Mike Simpson, has supported the agreement forged during talks led by Rep. Paul Ryan, R-Wisc., and Sen. Patty Murray, D-Wash.
Rep. Raul Labrador, from Idaho's 1st District, voted against the bill last week.