The move came as the Boehner plan, which leaders unveiled Monday, had been picking up support among rank-and-file members – until the CBO report threw the measure’s fate into uncertainty.

But even before the report, some House conservatives had come out against the plan, arguing that it doesn’t cut deeply enough. On Tuesday, Republican Study Committee Chairman Jim Jordan (Ohio) said that fewer than 218 Republicans would support the measure, meaning that Boehner would need the backing of some Democrats to pass the measure Thursday. Democratic leaders, meanwhile, insist that few, if any, of their members will back the plan.

Here’s our running tally of where the Boehner plan stands among House Republicans as of Wednesday morning (we’re keeping tabs on the members who have said in interviews or statements that they will vote “no” as well as those who have said they’re undecided but may be leaning “no”).

House Republican leaders can afford to lose the support of 23 of their 240 members before they will need some Democrats to help pass the measure.

GOP solid “no” (12)

Rep. Jim Jordan (Ohio)

Rep. Tim Huelskamp (Kansas)

Rep. Tom Graves (Ga.)

Rep. Jason Chaffetz (Utah)

Rep. Louie Gohmert (Texas)

Rep. Chuck Fleischmann (Tenn.)

Rep. Michele Bachmann (Minn.)

Rep. Jeff Flake (Ariz.)

Rep. Phil Gingrey (Ga.)

Rep. Todd Akin (Mo.)

Rep. Joe Walsh (Ill.)

Rep. Paul Broun (Ga.)

GOP undecided but may lean “no” (10)

Rep. Scott Garrett (N.J.)

Rep. Mick Mulvaney (S.C.)

Rep. Trey Gowdy (S.C.)

Rep. Dennis Ross (Fla.)

Rep. Jack Kingston (Ga.)

Rep. John Duncan (Tenn.)

Rep. Ben Quayle (Ariz.)

Rep. Paul Gosar (Ariz.)

Rep. Connie Mack (Fla.)

Rep. Steve Southerland (Fla.)

Staff writer Paul Kane contributed to this report.

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This post has been updated since it was first published.