GOP unity over the Iran war started to crack Thursday when Sen. Susan Collins of Maine voted with Democrats to halt the conflict, marking the first time a Republican has changed their vote on the military campaign in the Middle East.
While the vote failed, the shift signaled President Donald Trump could soon face far more resistance over the conflict. That’s especially true as he blows past a legal deadline this week for the U.S. to exit the war without congressional authorization.
Just two Republicans — Collins and Sen. Rand Paul of Kentucky — joined Democrats to support curtailing Trump in a 47-50 vote. Unlike Collins, Paul has supported all attempts to rein in the war. Sen. John Fetterman of Pennsylvania continued to be the lone Democrat to oppose the effort.
The measure is the sixth resolution the Senate has rejected since the conflict began in February.
The military campaign against Tehran will hit a 60-day deadline Friday that requires the administration to halt U.S. involvement unless Congress authorizes continued military action. Trump does not seem eager to end the military campaign unilaterally, and no legislation exists yet to green-light its continuation, meaning the war is certain to break the threshold.
Democrats have been counting on that deadline to sway Republicans, several of whom have said they’ll be hard pressed to continue their support beyond the deadline.
“Time’s up,” Minority Leader Chuck Schumer said on the Senate floor. “Republicans, stop sitting out, start speaking up.”
The War Powers Resolution of 1973 limits U.S. involvement in hostilities to 60 days after the president has notified Congress, which the Trump administration provided March 2. The White House can extend military operations for another 30 days in order to wind down U.S. involvement.
Collins flipped her vote a day ahead of the administration’s legal deadline, which she signaled would be a turning point for her. The move by Collins, who chairs the Senate Appropriations Committee, also reflects her tough reelection bid as Democrats count on unseating her to win the majority. The war is largely unpopular, and her challenger, Graham Platner, is running on an anti-war platform.
“I have said from the very beginning that the law is definitive that at 60 days, Congress has to either authorize or block the military hostilities,” Collins said ahead of the vote. “I’ve been pretty clear what I was going to do at that point.”
Collins gave a preview of her vote Tuesday, when she joined with Democrats on a separate measure to block potential military action against Cuba. That measure was also defeated by Republicans.
Other GOP senators who indicated the 60-day mark would be problematic for them held off joining with Democrats on Thursday. One such Republican, Sen. John Curtis of Utah, said in a statement that he was “engaged in thoughtful discussion” on the path forward. But he also warned: “I will not support continued funding for the use of force without Congress weighing in.”
A White House official, granted anonymity to describe the dynamics of the 60-day deadline ahead of the vote, said the administration “is in active conversations with the Hill on this topic.”
Defense Secretary Pete Hegseth, though, suggested to senators on Thursday that the ceasefire would effectively negate the 60-day clock. War powers advocates contend that’s not how the statute works and note the U.S. military is still blockading Iranian ports.
