The House of Representatives voted Thursday afternoon to establish a 10-member independent commission to investigate the conduct of the United States’ six-week air and naval campaign against Iran, with 39 Republicans joining every Democrat to deliver Speaker Mike Johnson one of the sharpest internal rebukes of his tenure and ensuring that the panel begins work before Memorial Day.

The 257-176 tally, recorded shortly after 3:40 p.m., adopted the resolution as narrowed by an amendment Rep. Theresa Holloway of Michigan negotiated last week with four moderate Republicans who had supplied the deciding signatures on the April 30 discharge petition. The amendment explicitly excludes from the commission’s mandate any review of “the underlying decision to engage” Iranian forces, focusing the panel on targeting decisions, casualty reporting, intelligence handling, munitions stewardship and the post-ceasefire force posture in the Gulf.

Johnson, in a procedural move that surprised members of his own conference, voted “present” rather than against the resolution, a decision two senior leadership aides described as an attempt to “give the institution a vote without giving the White House a fight.” The speaker left the chamber without speaking to reporters, instructing his communications office to circulate a written statement that called the commission “a narrow mechanism within constitutional bounds” while reiterating his view that the underlying war was “lawfully and successfully prosecuted.”

Holloway, the lead sponsor, took the well shortly before the final vote to thank the four Republicans who had broken the dam — Reps. Don Bacon of Nebraska, Brian Fitzpatrick of Pennsylvania, Mike Lawler of New York and Maria Salazar of Florida — and to read the names of the 412 American service members the Pentagon has now confirmed dead from the March 1 onset through the April 15 ceasefire. The reading took just under nine minutes, during which the chamber’s center aisle filled with members of both parties standing in silence.

“We are not relitigating a war. We are accounting for one,” Holloway said. “The families who buried sons and daughters this spring are not asking for partisanship. They are asking for an answer that does not depend on which committee chair feels like scheduling a hearing. Today this body finally answers them.”

The 39 Republican votes for the resolution came overwhelmingly from members who represent districts that backed Joe Biden in 2020 or that the Cook Political Report rates as competitive, but they also included five members from safer seats. Among the more surprising defectors was Rep. Garrett Hollander of Texas’s 24th district, an Armed Services committee member who had publicly opposed the petition as recently as last weekend and who said in a floor statement that the Defense Department’s “incomplete cooperation” with his committee had changed his calculation.

“I voted against this commission three times in committee. I am voting for it today because the Pentagon has spent five weeks responding to my written questions with the word ‘classified’ and the word ‘pending,’ and I am out of patience,” Hollander said.

House Minority Leader Hakeem Jeffries, who had threatened earlier in the week to slow consideration of the $94 billion war supplemental unless the commission resolution received “an honest vote on its merits,” called the outcome “a vindication of the institution” and declined to predict whether the supplemental would now move on a faster timeline. Democratic leadership aides said the caucus would hold a closed-door briefing Friday morning at which the commission’s likely membership and the petition’s interaction with appropriations would be discussed.

The White House response was measured. Press Secretary Karoline Leavitt, at the afternoon briefing, said President Donald Trump “respects the constitutional role of Congress” and would not seek to obstruct the commission’s work, while reserving the right to assert executive privilege “on a document-by-document basis.” Leavitt declined to say whether the administration would direct cabinet officers to testify voluntarily, a question that aides to several panel chairs said would shape the commission’s early posture.

Two senior administration officials, speaking on condition of anonymity to describe internal deliberations, said the president had instructed White House Counsel David Warrington to “find an accommodation, not a fight” with the commission, a posture they attributed to polling that has shown bipartisan support for an independent investigation in the high sixties for three consecutive weeks. A Marist survey released Wednesday placed support for the commission at 68 percent overall, including 53 percent among self-identified Republicans.

Under the resolution, the panel will be co-chaired by one Democratic and one Republican appointee with prior service at the cabinet or four-star level, with the remaining eight members named by the four party leaders in equal proportion. Holloway said she expected the co-chairs to be announced “within ten days” and that staff hiring would begin immediately, with an initial $14 million authorization drawn from existing congressional appropriations and the panel’s final report due no later than May 15, 2027.

Sen. Tim Kaine of Virginia, the lead Senate sponsor of the war powers resolution that cleared his chamber last Friday, said in a brief Capitol hallway exchange that the House action made it “more likely, not less” that Johnson would move the war powers measure to the floor before recess. “Two yes votes are better than one no vote,” Kaine said. “And one no vote is better than a desk full of unanswered mail.”

Republican strategists watching the count said the speaker’s “present” vote would likely contain damage within the conference without insulating swing-district members from attack ads on either flank. Karl Yoder, a Republican pollster tracking war-related ballot tests in five competitive states, said the day’s most consequential number was the 39 Republican yeas. “That number is going to be the floor for everything that comes next,” Yoder said. “Once you have 39 Republicans on record for oversight, you do not get to make this a partisan issue in October.”

Speaker Johnson’s office said it would announce the floor schedule for the war supplemental and the war powers resolution “within the next several legislative days,” with leadership aides indicating that both measures were likely to come up before the Memorial Day recess. Holloway said the commission’s first public hearing would be scheduled “as soon as the co-chairs are seated and the witness list is set,” and that she expected initial testimony from Pentagon comptroller and inspector general officials by early June.