Three Senate Republicans crossed the aisle Wednesday to join Democrats in voting to end Operation Epic Fury, fracturing what had been near-unified GOP support for President Trump's military campaign against Iran. Sens. Lisa Murkowski of Alaska, Susan Collins of Maine, and Rand Paul of Kentucky sided with Democrats on the latest war powers resolution, but the defections still fell short of the votes needed to terminate ongoing operations in the Middle East.
The vote capped months of Democratic efforts to peel Republicans away from backing the president's Iran policy. Sen. Jeff Merkley, the Oregon Democrat, led this latest attempt. For weeks, Senate Democrats had put war powers resolution after war powers resolution on the floor, and until now, the GOP conference had held firm.
That wall is cracking, and the timing could not be worse for the administration. Fox News Digital reported that the Senate vote landed on the same day Trump arrived in Beijing for a two-day summit with Chinese President Xi Jinping, a trip Senate Majority Leader John Thune said would carry significant national security implications.
The backdrop to Wednesday's vote is a ceasefire that appears to be disintegrating. On Tuesday, Trump rejected the latest proposal from Iran and offered a blunt assessment of where negotiations stand.
"I would say the ceasefire is on massive life support, where the doctor walks in and says, 'Sir, your loved one has approximately a 1% chance of living.'"
Trump also dismissed the substance of Iran's offer in characteristically direct terms, calling it "the weakest" and saying he "didn't even finish reading" what he described as a "piece of garbage."
With the truce collapsing and the president overseas in China, Senate Democrats chose this moment to force a vote, and for the first time, they found real Republican partners beyond Paul, who has consistently voted to limit the president's war powers authority.
Murkowski's defection was not a surprise to anyone paying attention. Earlier this month, the Alaska senator warned publicly that unless she saw signs a peace deal was nearing completion, or received further communication from the administration on its objectives, she would bring an Authorization for Use of Military Force to the Senate floor herself.
Congress blew past the 60-day deadline to formally weigh in on the fighting. Top administration officials argued the deadline was moot because combat had been paused under the ceasefire. But with that ceasefire now in critical condition, the legal footing looks shakier by the day.
During a Tuesday hearing on the president's $1.5 trillion Pentagon budget request, Murkowski pressed Secretary of War Pete Hegseth directly. She asked whether it would "be helpful to the president if it was made clear that, in fact, the Congress did allow, did provide an AUMF" should fighting restart. It was a pointed question, and one that exposed a real divide within the GOP over how to handle the war's legal architecture.
Hegseth's answer left no ambiguity about where the White House stands. He told the senator the president's position is that "he has all the authorities he needs under Article II to execute." That response essentially told Congress its input was unnecessary, a stance that clearly did not sit well with Murkowski, who voted against the administration the following day.
This is not the first time Murkowski and Collins have broken ranks on this specific question, but the persistence of these defections, and the fact that they keep growing, should concern GOP leadership.
Majority Leader Thune tried to hold the line before the vote, telling reporters it "would be best if everybody hung together and supported the president." But he also acknowledged the limits of party discipline on the issue.
"People have their own minds about some of these issues, and this is not a new vote, it's one we've had many times before, but you know, we'll see what votes are."
That measured tone, more resignation than rallying cry, suggests Thune knows the conference is under strain. And the fractures on Iran are hardly the only place the GOP majority has shown cracks. Recent votes on election integrity measures have seen similar breakaway patterns, with small groups of Republicans siding with Democrats against party-backed proposals.
Sen. Tim Kaine of Virginia, the Democrat who initiated the war powers push, wasted no time framing the GOP's reluctance to vote on an AUMF as a political dodge. He told Fox News Digital that if an AUMF were put on the floor and passed, it would transform what he called an "illegal and unwise war" into "just an unwise war, not an illegal one."
Kaine contended that Republicans have no interest in taking that vote because it would force them to own the conflict on the record.
"But I see almost no circumstance in which Republicans would want to have a vote on that in committee or on the floor. They are actively trying to avoid accountability for the war."
That accusation, that the majority is deliberately ducking a formal authorization vote to avoid political exposure, is the kind of charge that stings precisely because it contains a grain of procedural truth. Congress has the option of voting on an AUMF that would either authorize or halt further fighting in Iran. Neither chamber has done so.
The domestic political fight over Operation Epic Fury is playing out against a widening international backdrop. AP News reported that Iran's ambassador to South Korea urged Seoul, a key U.S. ally, to speak out against what he called "illegal aggression by U.S. and Israeli forces." Israel's ambassador, meanwhile, said the joint U.S.-Israeli operations are intended to destroy Iran's nuclear and ballistic missile capabilities. South Korea has not explicitly endorsed the attacks and instead called for a swift return to dialogue.
That diplomatic pressure abroad mirrors the political pressure at home. The longer the conflict drags on without a formal congressional authorization, the more ammunition Democrats have to frame the war as legally deficient, and the harder it becomes for Republican senators to explain why they refuse to vote on the question.
Some Republicans have argued privately that passing an AUMF would actually strengthen the president's hand, giving him a clear legal mandate if the ceasefire collapses entirely and fighting resumes. Murkowski's question to Hegseth during Tuesday's hearing reflected exactly that logic. But the administration has shown no interest in seeking congressional buy-in, insisting that Article II executive authority is sufficient.
That posture carries risk. If the ceasefire fails, and Trump himself put the odds of survival at roughly one percent, the administration will be conducting a major military operation with no congressional authorization, a lapsed 60-day window, and a growing number of Republican senators on record voting to end the campaign. The pattern of GOP senators flipping on key votes is becoming harder for leadership to dismiss as isolated dissent.
Wednesday's vote failed to end Operation Epic Fury. That is the headline result, and it matters. The president retains the political support he needs to continue operations in the Middle East.
But the trend line is moving in the wrong direction for the White House. Two months ago, Senate Democrats could not find a single Republican willing to join them on war powers. Now they have three, including Murkowski, who is not a reflexive opponent of the president but rather a senator who asked the administration for communication and clarity and did not get it.
Collins has long been a swing vote on matters of executive authority. Paul's position is ideologically consistent and well known. But Murkowski's shift carries a different weight. She did not simply vote no. She warned the administration publicly, asked pointed questions during a formal hearing, received an answer that amounted to "we don't need you," and then voted accordingly.
Broader concerns about internal GOP dysfunction heading into the 2026 midterms only amplify the stakes. Every visible crack in party unity gives Democrats a talking point, and gives wavering senators cover to break ranks again on the next vote.
Hegseth forcefully denied allegations during his Senate appearance that he or others may have profited from the war with Iran, a heated exchange that added to the combative atmosphere surrounding the administration's war policy on Capitol Hill.
The question now is whether the administration adjusts its approach or continues to tell Congress its involvement is unnecessary. If the ceasefire collapses and bombs start falling again, three Republican defections could easily become five or six. And at that point, the math changes.
When an administration tells its own allies in Congress to sit down and stay quiet, it should not be surprised when some of them stand up and walk across the aisle instead.
