Sen. Susan Collins voted with Democrats on Thursday to advance a war powers resolution aimed at halting U.S. military operations against Iran, the first Senate Republican to flip on the issue after five previous failed attempts to invoke the 1973 War Powers Act against the strikes President Trump ordered in late February.
The motion to discharge the resolution from the Senate Foreign Relations Committee still failed, 47 to 50. But Collins's defection, alongside Sen. Rand Paul of Kentucky, marked a visible crack in what had been a unified Republican wall on the Iran campaign. The Maine senator framed her vote not as opposition to the military itself but as a demand that the administration meet its legal obligations under the War Powers Act before continuing hostilities.
The timing made her move harder to dismiss. The 60-day window the War Powers Act gives a president to conduct military operations without congressional authorization expires Friday, one day after the vote. Trump notified Congress on March 2 of the use of armed forces against Iran, as The Hill reported, starting the clock two days after he ordered the initial strikes to begin on Feb. 28. U.S. forces carried out those strikes jointly with Israel.
Collins made clear before the vote that she intended to oppose continued strikes past the statutory deadline. She told reporters:
"The 60-day trigger is a very important one. At that point, Congress has to authorize the military action to continue. There's a 30-day period where you could wind it down. And I will not support extending the hostilities beyond that 60 days except for wind-down activities."
After the vote, she sharpened her position further. Collins praised the military's performance but said the administration had not laid out a sufficient case for extending the conflict.
"Our military has performed magnificently and with great courage and sacrifice in diminishing the threat that Iran poses to our country, our allies, the broader Middle East, and the world. Further military action against Iran must have a clear mission, achievable goals, and a defined strategy for bringing the conflict to a close. I voted to end the continuation of these military hostilities at this time until such a case is made."
That language, "achievable goals" and a "defined strategy", echoed the kind of demands Republicans have historically made of Democratic administrations before authorizing open-ended military commitments. Collins was turning the party's own playbook on its leadership.
Newsmax reported Collins went even further in a formal statement, calling the 60-day deadline "not a suggestion" but "a requirement." That framing placed her squarely at odds with the administration's legal posture on the conflict.
Defense Secretary Pete Hegseth appeared before the Senate Armed Services Committee on Thursday and offered the administration's counterargument. He contended that a ceasefire Trump announced earlier this month effectively paused the 60-day clock.
"We are in a ceasefire right now, which our understanding means the 60-day clock pauses or stops in a ceasefire."
Sen. Tim Kaine, a Virginia Democrat who has long pushed for congressional war powers enforcement, pushed back directly. Kaine told the committee he did not believe the statute supported Hegseth's reading.
"I do not believe the statute would support that. I think the 60 days runs maybe tomorrow, and it's going to pose a really important legal question for the administration there."
The legal question is real, and it matters beyond this single vote. If the administration's interpretation holds, that a ceasefire pauses the statutory clock, it would set a precedent allowing future presidents to extend military operations indefinitely by cycling through temporary truces without ever seeking congressional authorization. That is precisely the kind of executive overreach the War Powers Act was designed to prevent.
Collins, for all her reputation as a centrist willing to cross party lines, has previously staked out independent positions from the broader GOP caucus on institutional questions. Her vote Thursday fits that pattern, prioritizing process and constitutional structure over short-term partisan alignment.
The resolution Collins backed was sponsored by Sen. Adam Schiff, a California Democrat. That sponsorship alone made it politically toxic for most Republicans, given Schiff's long history of partisan combat during the Trump years. Yet Collins voted for it anyway, and Paul joined her on the companion measure to withdraw U.S. forces unless Congress votes to authorize continued operations.
The final tally, 47 to 50, fell short of the 60 votes needed to discharge the resolution from committee. Thursday's failure marked the sixth time Senate Republicans have defeated a War Powers Act resolution aimed at halting military operations against Iran. The pattern suggests Democratic leadership knew the votes were not there but wanted the roll call on the record.
One notable crossover went the other direction. Sen. John Fetterman of Pennsylvania was the only Democrat to vote against discharging the resolution from committee. Fetterman has increasingly broken with his party on foreign policy and defense matters, a trajectory that has drawn fire from progressive activists and praise from some on the right.
The broader Senate landscape adds context to these defections. Recent shifts in Senate race ratings have highlighted Republican vulnerability in certain states, creating incentives for incumbents to demonstrate independence from party leadership on high-profile votes.
Collins's vote does not mean she opposes the strikes themselves. She praised the military's performance explicitly. She did not question the decision to hit Iran or the joint operation with Israel. Her objection is procedural and constitutional: the administration must come to Congress, make its case, and obtain authorization before extending hostilities past the statutory window.
That distinction matters. Conservatives who value executive strength on national security should also value the constitutional framework that channels and legitimizes that strength. A president who acts without congressional authorization past the War Powers Act deadline is not projecting strength, he is inviting a legal and political crisis that weakens his hand.
The administration's position, that a ceasefire pauses the clock, has not been tested in court and faces skepticism even from senators generally sympathetic to broad executive war powers. If Hegseth's reading is wrong, the administration will find itself conducting military operations without legal authority as of Friday. That is not a position any White House should want to occupy.
Intraparty tensions of this kind are not confined to foreign policy. Partisan escalation in Washington has made it harder for individual senators to break ranks on any issue without being cast as traitors to their side. Collins's willingness to take that risk on a war powers question, where the constitutional stakes are clear, deserves more serious engagement than the usual cable-news framing of "Republican breaks with Trump."
Meanwhile, the political pressures facing Republican senators are real and varied. Some face primary challenges that reward lockstep loyalty. Others, like Collins in purple-state Maine, face general-election electorates that reward demonstrated independence. The incentive structures are different, and they produce different votes.
The 60-day deadline expires Friday. The resolution failed. The administration says the clock is paused. Key senators, including at least one Republican, say it is not.
What happens next will test whether the War Powers Act still functions as a check on executive military authority or whether it has become a dead letter that presidents of both parties can ignore at will. Collins forced the question into the open. The administration now has to answer it, with something more persuasive than a ceasefire theory that even sympathetic lawmakers find hard to swallow.
Congress wrote the War Powers Act for exactly this moment. If senators won't enforce it, they should stop pretending it means anything at all.
