None of the four Republican House members who are likely running for Senate next year support House Speaker John BoehnerJohn Andrew BoehnerPrinciples to unify America Feehery: A possible House Speaker conundrum for Democrats Obama on bipartisanship: 'There is a way to reach out and not be a sap' MORE's (Ohio) plan for a short-term increase in the debt ceiling.

Reps. Todd Akin (R-Mo.) and Jason ChaffetzJason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah) are firm nos, according to The Hill's Whip List, while Rep. Jeff FlakeJeffrey (Jeff) Lane FlakeBiden eyeing Cindy McCain for UK ambassador position: report Profiles in cowardice: Trump's Senate enablers McSally concedes Arizona Senate race MORE (R-Ariz.) said he "can't support the current bill." Rep. Denny Rehberg (R-Mont.) has not yet indicated which way he will vote.

ADVERTISEMENT

Akin faces a potentially tough primary challenge from former Missouri State Treasurer Sarah Steelman, and can't afford to give her an opening to run at him from the right. They each hope to be the nominee against Sen. Claire McCaskillClaire Conner McCaskillDemocrats must turn around Utah police arrest man driving 130 mph claiming he was going to kill former Missouri senator McCaskill congratulates Hawley on birth of daughter MORE (D-Mo.), but risk running too far to the right in the primary to win the swing state.

Both parties are on the attack over the issue. Missouri Democratic Party spokeswoman Caitlin Legacki pointed out that Sen. John McCainJohn Sidney McCainBiden eyeing Cindy McCain for UK ambassador position: report The Memo: GOP mulls its future after Trump Juan Williams: Obama's dire warnings about right-wing media MORE (R-Ariz.) had described the "cut, cap and balance" approach to raising the debt ceiling favored by both Akin and Steelman "bizarre" and "foolish," and ripped them for their positions.

"If there were any questions whether Sarah Steelman and Todd Akin are too extreme for Missouri’s middle class families, this should remove all doubt," said Legacki in a statement. "Rather than supporting commonsense ideas and reasonable compromise, Steelman and Akin would rather play chicken with the economy to score political points. That’s not leadership, that’s recklessness."

The National Republican Senatorial Committee also attacked McCaskill for opposing BoehnerJohn Andrew BoehnerPrinciples to unify America Feehery: A possible House Speaker conundrum for Democrats Obama on bipartisanship: 'There is a way to reach out and not be a sap' MORE's plan. "In yet another sign that she’s prepared to put the reelection efforts of herself and President Obama ahead of avoiding the federal government defaulting on its debt for the first time in U.S. history, U.S. Sen. Claire McCaskill joined with her liberal party leaders last night in signing a letter announcing her firm opposition to the two-step plan offered by House Speaker John Boehner which will be voted on by the House later today," NRSC communications director Brian Walsh wrote in an email Thursday morning.

Senate race politics could also be playing a part in other House members' decisions. Chaffetz is all but certain to challenge longtime incumbent Sen. Orrin HatchOrrin Grant HatchMellman: What happened after Ginsburg? Bottom line Bottom line MORE (R-Utah) for the Republican nomination and is counting on strong Tea Party support, which he would likely lose if he backed Boehner's plan.

Flake has long been a crusader for fiscal conservatism, but has a political reason to oppose the plan as well: he has already lost favor with some Arizona conservatives because of past centrist votes in immigration, and while he doesn't yet have a primary challenger, a vote for this plan could invite one.

Rehberg, challenging Sen. Jon TesterJonathan (Jon) TesterOvernight Defense: Trump loyalist to lead Pentagon transition | Democrats ask VA for vaccine distribution plan | Biden to get classified intel reports Senate Democrats press VA for vaccine distribution plan President is wild card as shutdown fears grow MORE (D-Mont.), hails from a Republican-leaning but populist state, and was one of four Republicans to vote against the GOP budget plan authored by Rep. Paul RyanPaul Davis RyanPaul Ryan calls for Trump to accept results: 'The election is over' Bottom line Democratic anger rises over Trump obstacles to Biden transition MORE (R-Wis.) that would have privatized Medicare.

The four also don't have to fear Boehner's wrath in the same way that other Republican House members do, since they won't be around much longer, meaning that the GOP leadership can't leverage their votes in the same way it could others.