Senate Republicans are in a standoff over whether to use their final weeks in the majority to “shovel more money” into President Donald Trump’s biggest looming crisis, a new report revealed Wednesday. According to Semafor Congressional Bureau Chief Burgess Everett, the GOP is divided over whether to push through a budget reconciliation bill that may be its final chance to fund party priorities for years to come — a package that would include spending billions more on Trump’s war with Iran and that Sen. Bernie Moreno (R-Ohio) has dubbed the “last supper” for the party’s reign.

Republicans are racing the clock. Budget reconciliation would allow them to sidestep a filibuster and send Trump funding his allies consider vital for replenishing diminished military reserves and ammunition after nine months of war. The procedural tool, created by the Congressional Budget Act of 1974, requires only a simple majority rather than the 60 votes normally needed to end debate on most Senate legislation — which is why the lame-duck stretch between this month’s midterms and the seating of the new Congress in January represents Republicans’ last chance to use it without Democratic support. Democrats, meanwhile, have suggested they would block a government funding bill if it includes money for the Iran conflict, meaning the GOP must reach an internal agreement quickly if it wants to secure the money.

Everett reported that Senate Republicans have spent the week working through their disagreements but still lack a plan. “They still haven’t figured out how to use their greatest power in the lame duck: another big party-line bill that would send billions to the Pentagon,” he wrote, noting that such a proposal could contain other GOP priorities.

“But passing a party-line bill is not going to be easy,” Everett wrote. “It requires 50 Senate votes, a majority in the House, and two unlimited Senate vote-a-ramas that defeated or retiring members may have little interest in enduring.” Vote-a-ramas — marathon sequences of rapid-fire amendment votes that can run for hours — are a familiar feature of reconciliation floor debates.

Senate Budget Chair Ron Johnson (R-WI), who would be responsible for teeing up another big party-line bill, said he is worried the party is not moving quickly enough. “Right now, I’m not getting engagement from the White House, from either Senate or House leadership. So if that’s going to happen, it’s going to come from the pressure from members here,” Johnson told Semafor on Tuesday. Whether that engagement arrives from the White House or congressional leadership is now one of the clearest signals of whether the bill can move before the window closes.

The politics of the question are fraught. Republicans are divided over whether to “shovel more money towards the Pentagon” while the Iran war continues, Everett reported, particularly since many in the GOP cite the conflict as one of the main reasons for the party’s brutal losses in this month’s midterm elections — defeats that will end the party’s Senate majority when the new Congress convenes in January.

A growing number of Republicans are also signaling public frustration with Defense Secretary Pete Hegseth, who avoided a House impeachment on Tuesday but continues to draw criticism from congressional Republicans over Iran and his blocking of military promotions over issues such as race, gender and political views. Republicans concede they have no framework for overcoming such issues. “I think we’re going to have a plan,” Sen. John Kennedy (R-LA) said after a long day of internal GOP meetings. “If you’re asking me if we have a plan right now, I wouldn’t recognize it if it jumped up and yodeled and bit me in the butt.”

The clearest divisions have emerged over funding the war itself. On one side is Senate Armed Services Chair Roger Wicker (R-MS), who asserts Republicans “need to get reconciliation done.” Sen. Jim Banks (R-IN) said the party needs to pass a “strong” reconciliation bill, one not aimed specifically at the war with Iran. “That has a lot more to do with funding our military and giving them what they need than it does the war,” Banks said.

On the other side, Sen. Rand Paul (R-KY) argues it would be “tone-deaf” to pass such a bill, and he has vowed to oppose it. Passing anything “to further or enhance the Iran war, I think that’s not listening to the electorate,” Paul said. Sen. Josh Hawley (R-MO) agreed: “I can’t imagine why we would do that.” Sens. Susan Collins (R-ME) and Lisa Murkowski (R-AK) are both skeptical of using reconciliation.

According to Everett, “Republicans would not brand the effort as an Iran war funding bill, but they would have a difficult argument to make if the conflict continues. Many Republicans have wanted the war to end as soon as it started.”

While some Republicans have argued that a reconciliation bill could be their last chance to “jam” through their priorities, Senate Majority Leader John Thune (R-SD) said repeatedly this week that he is not sure he or House Speaker Mike Johnson (R-LA) can secure the votes needed to pass it. Whether those votes come together — and whether Democrats carry out their stated plan to block any government funding bill containing Iran money — will shape how the party’s final weeks in the majority end.