The House on Wednesday voted to direct President Trump to withdraw U.S. forces from the conflict with Iran or win approval from Congress to continue the war, after four Republicans sided with Democrats in a striking sign of growing opposition to a military campaign now in its fourth month.
Adoption of the resolution was a remarkable rebuke to Mr. Trump and his handling of the conflict, after he has repeatedly dismissed any effort by Congress to curb his power and as the G.O.P. has largely ceded its prerogatives to do so, deferring to him time and again. Republicans had abruptly postponed the vote two weeks ago, recognizing that they did not have sufficient votes to defeat the measure and wanting to spare themselves and the president the affront.
But they made no headway over the ensuing days in winning converts, as the conflict has dragged on and Mr. Trump has made little progress toward ending it. G.O.P. leaders were unable to delay the vote any longer because Democrats had invoked the War Powers Resolution, which requires consideration of such measures within a limited period of time.
The move was also the latest reflection of divisions between Republicans in Congress and the president on a range of issues as their interests diverge in the run-up to the midterm congressional elections. It came after Senate Republicans have in recent days forced Mr. Trump to abandon his request for $1 billion in security funding for his ballroom project and a plan that the Justice Department announced to create a federal fund to pay claimants who accuse the government of having victimized them.
The vote was 215 to 208 to adopt the war powers resolution, sending it to the Senate. Even if it were to pass both chambers, the ability of lawmakers to force a president to withdraw troops remains a contested legal question, and Mr. Trump and his senior aides have dismissed any effort by Congress to limit his war powers as unconstitutional.
But the vote in the House, and a similar one in the Senate last month when a handful of G.O.P. defectors broke from the president and opposed the war, indicate an increasing willingness by some members of the president’s party to pressure him to end a conflict that a majority of Americans say is not worth the costs.
Republican Representatives Tom Barrett of Michigan, Brian Fitzpatrick of Pennsylvania, Warren Davidson of Ohio and Thomas Massie of Kentucky crossed party lines to vote with Democrats in favor of the resolution. Representative Jared Golden, Democrat of Maine, who had previously opposed similar measures, switched his position to support it.
Representative Gregory W. Meeks of New York, the top Democrat on the Foreign Affairs Committee who led the measure, praised its Republican supporters for standing up to a president who has in recent weeks sought political retribution against members of his party who have bucked him, including Mr. Massie.
Moments after the vote, he said the Republican defectors “had the wherewithal to search within themselves to do the right thing.”
Though the few defections were notable, almost every Republican voted against the resolution. Most of them have accepted the Trump administration’s claim that the initial operation had concluded and that the most recent strikes in Iran were necessary acts of self-defense, arguing that gave him full power as the commander in chief to order American troops to respond.
Republican lawmakers in the House had been able to maintain enough unity to ward off previous attempts to limit Mr. Trump’s authority.
Moments before the vote, Speaker Mike Johnson told reporters that passing the resolution would be a “very dangerous prospect” and that it would “weaken” the president’s ability as commander in chief to continue seeking a peaceful resolution to the conflict.
Earlier this week, however, Mr. Trump declared that the pace of diplomatic talks through interlocutors as they seek to reach a preliminary agreement was starting “to get very boring.”
Many have dismissed Democrats’ war powers measures, which call for the removal of most U.S. forces from hostilities in Iran, as politically motivated attacks on the president that would leave American interests unprotected.
Democrats contended that members of both parties must protect the role of Congress to determine when and how the country undertakes prolonged combat operations overseas.
Mr. Davidson, who in March sided with Democrats in favor of a war powers measure on Iran but later reversed himself as Mr. Trump and party leaders applied intense pressure for Republicans to stay in line, framed his decision to vote with Democrats again on Wednesday again as a call for Congress to be involved in outlining a plan that would allow the operation to succeed.
“Define the mission. Authorize the mission. Accomplish the mission,” he said in a brief statement following his vote.
Mr. Barrett, a first-term Republican facing a competitive re-election race, similarly argued that the time for the president to act alone had expired and Congress needed more of a say.
“My support of this resolution tonight is consistent with my belief that it is time for Congress to decide the scope of the mission and the appropriate limits on the use of force in Iran,” he said in a statement.
The House’s vote was only the first step in a complicated and likely uphill path for the resolution. It now heads to the Senate, which under the war powers law must take it up within roughly two and a half weeks. It does not need a presidential signature, but even if Congress were to clear the measure, its legal force would remain uncertain.
While Congress has historically deployed concurrent resolutions to express its position on an issue without requiring presidential approval, the Supreme Court held in 1983 that in order for congressional actions to have binding legal effect, they must go through the standard legislative process, including being presented to the president to be signed into law.
That means any attempt to make the directive to withdraw U.S. forces in Iran legally enforceable would almost certainly require Mr. Trump’s signature, or have two-thirds of both chambers vote to override a veto.
The Senate is pursuing a parallel track. Last month, four Republicans and all but one Democrat voted to advance a separate war powers resolution toward a full floor vote, but that effort faces procedural hurdles of its own.
But while the practical odds of either measure forcing an end to the war remain slim, the action in both chambers amounted to a notable reproach of the president’s handling of the conflict.
Democrats have argued that even symbolic congressional action could pressure Mr. Trump to alter course by signaling growing bipartisan discomfort with a longer war.
“Congress has followed the Constitution today,” Mr. Meeks said. “Democrats and Republicans said ‘Enough is enough.’ The Constitution says only Congress can determine when we go to war.”










