A quartet of House Republicans eyeing Senate runs were among the 66 Republicans who voted against the bipartisan compromise to increase the debt limit. GOP Reps. Todd Akin (Mo.), Jason Chaffetz (Utah), Denny Rehberg (Mont.) and Jeff Flake (Ariz.) all broke with their party's leadership and opposed the agreement.
Chaffetz is considering a challenge of longtime Republican Sen. Orrin Hatch (Utah), who has said he is unlikely to vote for the deal in the Senate Tuesday. He has been trying to shore up his conservative bona fides since it became clear he could face a challenge from the right, although Chris Chocola, president of the conservative Club for Growth, indicated to The Hill Monday that Hatch's recent votes won't stop the deep-pocketed group from targeting him.
Rehberg is running against Sen. John Tester (D-Mont.), and Flake is running for the Arizona Senate seat that will be vacated by retiring Sen. John Kyl (R).
Chaffetz and Akin are dependent on their state's Tea Party adherents to win their primaries. Flake is unlikely to face a serious primary, but has taken some centrist stances on immigration that have angered some of the state's conservatives.
Rehberg will likely have a clean shot at Tester in the Republican-leaning state. He said he could not support the plan because it did not include a balanced-budget amendment.