Republicans struggled Thursday (May 21, 2026) to find the votes to dismiss legislation that would compel President Donald Trump to withdraw from the war with Iran, delaying planned votes on the matter into June.

The House had scheduled a vote on a war powers resolution, brought by Democrats, that would rein in Mr. Trump's military campaign. But as it became clear that Republicans would not have the numbers to defeat the bill, GOP leaders declined to hold a vote on it.

Republicans are also working to ensure they have the votes to dismiss another war powers resolution in the Senate that advanced to a final vote earlier this week, when four GOP senators supported the resolution and three others were absent from the vote.

The actions by congressional leaders showed the increasing difficultly of maintaining political backing for Mr. Trump's handling of the war. Rank-and-file Republicans are increasingly willing to defy the president over the conflict.

Frustration with Iran war grows on Capitol Hill

On Capitol Hill, patience with the war has worn thin as the stalemate in the Strait of Hormuz disrupts global shipping and elevates gas prices in the U.S Another House war powers resolution nearly passed last week, falling on a tie vote as three Republicans voted in favor.

Democratic Rep Gregory Meeks of New York, who sponsored the war powers resolution, had said he expected to have the votes this time around.

“Congress has a constitutional duty. It has a duty to act, not to cheerlead, especially not to cheerlead an open-ended war of choice,” Mr. Meeks said.

The lone Democrat who voted against the war powers resolution last week, Rep Jared Golden of Maine, had said he would vote in favour of the legislation this time. Meanwhile, leaders of both parties dealt with several absences that could have shifted the vote either way in the closely divided chamber.

Republicans have been broadly supportive of Mr. Trump's efforts to destroy Iran's nuclear capabilities, but some are now saying the president's legal timeline to wage a war without congressional approval has expired. Under the War Powers Resolution of 1973, presidents have 60 days to engage in a military conflict before Congress must either declare war or authorise the use of military force.

“We have to follow the law,” said Rep. Brian Fitzpatrick, a Pennsylvania Republican, shortly after he voted for an Iran war powers resolution for the first time last week.

The dispute over war powers

The White House argues that the requirements of the War Powers Resolution no longer apply because of the ceasefire with Iran. At the same time, Trump has said he was just an hour away from ordering another strike on Iran earlier this week, but held off because Gulf allies said they were engaged in negotiations to end the war.

Still, Mr. Trump said on social media that military leaders should “be prepared to go forward with a full, large scale assault of Iran, on a moment's notice, in the event that an acceptable Deal is not reached.” Trump has repeatedly set deadlines for Tehran and then backed off.

Sen Thom Tillis, a Republican who has so far voted against the war powers resolutions, expressed frustration with the Trump administration's stance, especially from Defense Secretary Pete Hegseth.

“The current status quo, Pete Hegseth demonstrates how incompetent he is,” Tillis told reporters, adding that he would be willing to vote for an authorization for use of military force.

Democratic senators rallied outside the Capitol Wednesday alongside VoteVets, a left-leaning veterans' advocacy group. They placed signs on the Capitol lawn noting that the nationwide average price of gasoline had risen to USD 4.53.

Sen Tammy Duckworth, an Illinois Democrat who served in the Iraq War with the Air National Guard, argued that the Iran war has amounted to a strategic blunder for Trump.

“Trump started a war, and he's made things worse than before,” Duckworth said, pointing to Iran's new leadership and the country's willingness to put a chokehold on commercial shipping through the Strait of Hormuz.

Republican leaders praised Mr. Trump for taking what they said was bold action to directly confront Iran, a nation that has been a US adversary for decades.

“I'm an American. I don't believe in getting hit and walking away and pretending as though it didn't happen,” said Rep. Brian Mast, the Republican chair of the House Foreign Affairs Committee.

For Congress, the growing momentum to pass a war powers resolution could eventually lead to a legal showdown over who has the final authority over military conflicts.

The legislation before the House Thursday was a concurrent resolution that lawmakers said would take effect without Trump's signature if it passed both chambers of Congress.

But Mr. Trump has also argued that the 1973 law — passed by Congress during the Vietnam War era in an attempt to take back its power over foreign conflicts — is unconstitutional.