Four Republican senators broke with their party to demand an end to U.S. hostilities in Iran, but the war powers resolution failed 49, 50, leaving the conflict's political fallout squarely on the ballot this November.
The Senate on Thursday rejected a concurrent resolution that would have directed President Trump to withdraw American armed forces from Iran. Republican Sens. Susan Collins of Maine, Rand Paul of Kentucky, Thom Tillis of North Carolina, and Lisa Murkowski of Alaska crossed party lines to vote in favor, joining nearly every Democrat in the chamber. The measure still fell one vote short, 49, 50, after Democratic Sen. Angela Alsobrooks of Maryland did not cast a vote.
The resolution, a concurrent measure that carries no force of law and would not have required the president's signature, marked the latest in a string of congressional attempts to reassert war powers authority over the Iran conflict. The Washington Examiner reported it was the fourteenth such war powers vote in the Senate since hostilities began in February. Every one has failed to compel a change in policy.
The one-vote margin hinged on shifts within the Republican conference. In June, the Senate passed a separate war powers resolution 50, 48, with Collins, Paul, Murkowski, and Sen. Bill Cassidy of Louisiana voting in favor. Democrat John Fetterman of Pennsylvania voted against that earlier measure, narrowing the margin from the other side.
This time, Cassidy voted against the resolution. So did Sen. Jon Husted of Ohio. Both senators have been described as critical of the Iran war, but neither offered a public explanation for the reversal. Tillis, who did not vote for the June resolution, flipped the other direction and supported the September measure.
Sen. John Kennedy of Louisiana told the Daily Caller News Foundation that Trump was "mad as a murder hornet" during a June lunch with Senate Republicans after the earlier resolution passed. The president's displeasure appeared to carry weight: Cassidy, Kennedy's fellow Louisiana senator, fell back in line for the September vote.
Fetterman again broke with his party and voted against the resolution, according to Just The News, which confirmed the Pennsylvania Democrat crossed party lines a second time to oppose the measure.
The Senate vote followed a September 16 House vote in which seven Republicans joined Democrats to pass the resolution. Reps. Tom Barrett of Michigan, Warren Davidson of Ohio, Brian Fitzpatrick of Pennsylvania, Nancy Mace of South Carolina, Thomas Massie of Kentucky, Zach Nunn of Iowa, and Mariannette Miller-Meeks of Iowa all voted yes.
Several of those members represent swing districts heading into November. Iowa, Ohio, Texas, and Kansas have all emerged as competitive midterm battlegrounds, and the war's economic toll has given Democratic challengers an opening. In Texas, Attorney General Ken Paxton faces Democratic state Rep. James Talarico in a Senate race that has forced Republicans to ramp up spending to rescue Paxton's candidacy. Collins faces Democrat Troy Jackson in a tight Maine re-election fight.
Republicans who previously supported the war have begun shifting their rhetoric. Rep. Ashley Hinson of Iowa, who backed the conflict earlier, posted on X on September 21 calling for relief from the war's economic costs.
"Iowans are being squeezed and shouldn't have to foot the bill at the pump or the checkout line for the war in Iran. We need to use every option at our disposal to provide some relief from high prices. That includes suspending the gas tax, pausing diesel exports, unleashing E-15 everywhere we can, reinstating the $1/gallon biodiesel tax credit, and creating a diesel relief program to help our farmers and truckers being crushed by the high costs."
Reps. Tom Tiffany of Wisconsin and former Rep. Mike Rogers of Michigan also called for the war to end despite their earlier support. The House vote on the companion resolution showed the breadth of Republican unease, seven defections in a GOP-controlled chamber is not a rebellion, but it is a warning sign six weeks before an election.
Public opinion has moved sharply against the conflict. A CNN/SSRS poll found that just 26 percent of Americans approved of Trump's handling of the Iran war. Even among Republicans, the number sat at only 60 percent, a weak showing for a wartime president within his own party.
The most striking figure: 53 percent of Republican or Republican-leaning voters younger than 45 disapproved of Trump's handling of the conflict. That generational split within the GOP base helps explain why broad public opposition to the war has begun translating into real legislative pressure, even from members who have no ideological objection to military action.
A separate Reuters/Ipsos poll found that only 34 percent of respondents approved of the strikes on Iran, reinforcing the picture of a conflict that has lost public support across party lines.
House Democratic Leader Hakeem Jeffries seized on the political dynamics. Reuters quoted him saying:
"It's interesting to me that several of them who are in tight races and on the verge of losing, including in places like Iowa or Michigan or Wisconsin, are all now starting to say the war needs to end."
Democrats have used the war powers framework repeatedly since February, but the concurrent resolution format carries a fundamental limitation: it does not have the force of law. Even if it had passed, Trump would not have been obligated to comply. The resolution's own text, as reported by Just The News, directed the president "to remove the use of United States Armed Forces from hostilities against the Islamic Republic of Iran", but that directive would have amounted to a statement of congressional sentiment, not a binding order.
Sen. Jim Risch of Idaho, who opposed the resolution, argued during the June debate that passage would undermine ongoing negotiations. "If this passes, the Iranians are going to simply stand up and walk away from negotiations," Risch said. He also disputed the resolution's premise, claiming, "There are no Armed Forces at this moment that are engaged in hostilities with Iran."
That claim sat uneasily beside the resolution's repeated references to active hostilities, the growing casualty of fuel prices at home, and the broader legislative fights over defense spending that the war has triggered on Capitol Hill.
Alsobrooks's absence loomed over the final tally. Had the Maryland Democrat voted, the resolution would have passed 50, 50, potentially requiring a tiebreaker. Her office offered no public explanation for the missed vote.
Fourteen Senate votes on the same question, the same result each time, and a conflict that remains as unpopular as it is unchanged. Congress has found plenty of ways to register its discomfort with the Iran war, everything except a mechanism that would actually end it.