Senate war powers resolution on Iran fails by a single vote weeks before midterms

 September 25, 2026 
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The Senate narrowly defeated a war powers resolution directing President Trump to withdraw U.S. forces from Iran, with the 49, 50 vote exposing deepening Republican fractures just weeks before competitive midterm elections.

Four Republican senators broke ranks Thursday and voted with Democrats to pass the concurrent resolution: Susan Collins of Maine, Rand Paul of Kentucky, Thom Tillis of North Carolina, and Lisa Murkowski of Alaska. The measure failed anyway when Democratic Sen. Angela Alsobrooks of Maryland did not vote, leaving supporters one short of the simple majority they needed, the Daily Caller reported.

The result hands the White House a legislative win on paper. But the margin, a single absent senator, tells a different story about where the Republican conference stands on the Iran conflict as voters head to the polls.

Fourteen failed votes and counting since February

Thursday's tally marked the fourteenth time the Senate has voted on a war powers resolution since the Iran war began in February, the Washington Examiner reported. Each attempt has failed. Each failure has come by a narrower margin than the last.

The resolution is a concurrent resolution, a congressional measure that does not carry the force of law. Even if it had passed, President Trump would not have been legally obligated to comply. The symbolic weight, though, matters in an election year. A majority vote rebuking a president's war policy from his own party's Senate would have been a sharp political blow heading into November.

The House had already passed the resolution on September 16, with seven Republicans crossing the aisle: Tom Barrett of Michigan, Warren Davidson of Ohio, Brian Fitzpatrick of Pennsylvania, Nancy Mace of South Carolina, Thomas Massie of Kentucky, and Iowa's Zach Nunn and Mariannette Miller-Meeks. That House vote set up the Senate showdown that played out Thursday.

Collins, Tillis, Paul, and Murkowski sided with Democrats, again

Three of the four Republican defectors were repeats. Collins, Paul, and Murkowski had all voted for a separate war powers resolution that passed the Senate back in June. So had Louisiana Sen. Bill Cassidy, who this time voted no.

The new addition was Tillis, who has grown more vocal about the administration's handling of the conflict. Fox News reported that Tillis told colleagues the administration owed Congress more transparency on the war effort.

"We deserve an update. You better start treating, Congress can be an assistance with this war effort, if you inform us.", Sen. Thom Tillis, R-N.C.

Tillis framed his vote not as opposition to the president but as frustration with the flow of information from the executive branch to Capitol Hill. Whether voters in North Carolina draw the same distinction remains to be seen.

Cassidy and Ohio Sen. Jon Husted, both described as critics of the Iran war, nonetheless voted against the resolution. The fact pack does not explain their reasoning. But the shift from Cassidy, who backed the June resolution, suggests the White House applied pressure in the intervening months. That pressure was not subtle. Sen. John Kennedy of Louisiana told the Daily Caller News Foundation that Trump was "mad as a murder hornet" after the June vote passed the upper chamber.

Trump himself appeared unbothered by the political fallout. He dismissed concerns about the war's electoral impact, telling reporters the only thing that matters is that "Iran will never have a nuclear weapon."

Polling shows the Iran war dragging on Republican support

The president's confidence may not match the numbers. A CNN/SSRS poll found that just 26 percent of Americans approved of Trump's handling of the Iran war. Even among Republicans, the figure sat at only 60 percent, a weak number for a wartime president within his own party.

More troubling for GOP strategists: 53 percent of Republican or Republican-leaning voters younger than 45 disapproved of his handling of the conflict. That is the demographic the party needs to turn out in competitive House and Senate races across Texas, Ohio, Iowa, and Kansas.

The political math is already showing up on the ground. In Texas, Republicans have ramped up spending and campaigning to rescue Attorney General Ken Paxton's Senate bid against Democratic state Rep. James Talarico. Collins faces a tight re-election fight in Maine against Democrat Troy Jackson. These are races that should not be close for incumbents in a midterm cycle, and the Iran war is one reason they are.

House Republicans who backed the war are now calling for it to end

The cracks are not limited to the Senate. Several House Republicans who previously supported the war have reversed course as gas prices and inflation squeeze their constituents. Rep. Ashley Hinson of Iowa, Rep. Tom Tiffany of Wisconsin, and former Rep. Mike Rogers of Michigan have all called for the conflict to wind down.

Hinson posted on X on September 21 laying out a series of domestic energy proposals aimed at softening the war's economic blow on Iowa families:

"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."

Hinson's statement is notable because it concedes the core argument war powers advocates have been making for months: the conflict is costing American families real money. She stopped short of endorsing the resolution itself, but the policy wish list reads like someone who knows her voters are angry and needs to show she is doing something about it.

That tension, between loyalty to the president and accountability to constituents paying higher prices, is the fault line running through the Republican conference right now. The four Senate defectors chose one side of it. The rest of the caucus chose the other. Neither side looks entirely comfortable with the choice.

Alsobrooks' absence tipped the outcome

The resolution failed by one vote, and that one vote belonged to a senator who was not in the chamber. Alsobrooks, the Maryland Democrat, did not vote. No public explanation for her absence appeared in the reporting. Had she been present and voted yes, the resolution would have passed 50, 50, still short without a tiebreaker, but a symbolic majority nonetheless.

Democrats who spent weeks framing the vote as a referendum on presidential overreach now have to explain why one of their own members did not show up for the count. The broader pattern of the House passing these resolutions and the Senate blocking them continues, but this was the closest the upper chamber has come to flipping the result.

A nonbinding vote with binding political consequences

Concurrent resolutions do not carry the force of law. Trump could have ignored this one even if it had passed. But the political signal would have been unmistakable: a majority of the Senate, including members of the president's own party, formally directing him to bring troops home from Iran.

That signal was blocked, barely. And the blocking came at a cost. Four Republican senators are now on record opposing the president's war policy weeks before their voters decide whether to keep them. Vulnerable House Republicans in Iowa, Michigan, Ohio, and Pennsylvania already crossed that line on September 16. The bipartisan nature of the defections makes the war harder for either party to use cleanly as a campaign weapon.

The Iran conflict is now roughly eight months old. Fourteen war powers votes have failed. Approval numbers are low. Gas prices are high. And the midterms are close.

A war that cannot win a majority in the Senate is a war that will be fought at the ballot box instead.

About Benjamin Clark

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