US House rebukes Trump with war powers resolution over Iran conflict

The United States House of Representatives has passed a war powers resolution seeking to curtail President Donald Trump’s authority to conduct military operations against Iran without congressional approval. The measure passed by a vote of 215 to 208 on Wednesday, marking the first successful passage of such a resolution in the House this year and signalling a significant legislative challenge to the executive branch’s conduct of the ongoing conflict.

The vote serves as a direct rebuke to Trump’s decision to join Israel in attacking Iran on 28 February, an operation that has now reached its 100th day. Despite the conflict’s duration and cost, the President has not sought formal congressional authorisation, characterising the engagement as a “skirmish” or “short-term excursion.” The resolution asserts the constitutional principle that the power to declare war rests solely with Congress, not the executive branch.

Passage of the bill required a rare alignment of political forces. All Democrats supported the measure, while four Republicans—Tom Barrett of Michigan, Warren Davidson of Ohio, Brian Fitzpatrick of Pennsylvania, and Thomas Massie of Kentucky—defected from the party establishment to cross the aisle. Their votes were decisive in overcoming unified Republican opposition to the resolution.

The legislative effort faced significant procedural hurdles earlier in the year. On 21 May, House Speaker Mike Johnson, a close ally of the President, adjourned the chamber early to prevent a vote on the resolution, despite indications that it would pass with sufficient Republican support. The measure was revived following the Memorial Day recess and proceeded to a vote after being rescheduled.

The financial and strategic implications of the conflict have drawn sharp criticism from lawmakers and analysts. The Pentagon estimated in May that $29bn has been spent on the war, though some experts argue this figure is an undercount. A Harvard University public finance expert projected in April that total costs could exceed $1 trillion. Additionally, the Center for Strategic and CSIS warned that critical munitions stocks, including Tomahawk missiles and THAAD systems, have run low as usage outstrips replacements.

Representative Ayanna Pressley and Representative Shontel Brown highlighted the constitutional and fiscal concerns in the aftermath of the vote. Pressley urged the Senate to follow suit, while Brown emphasised the need to end what she termed a “costly war” driven by executive overreach. The resolution now moves to the Senate, where Republicans hold control, and is expected to face a presidential veto if enacted.

Thomas Massie, one of the Republican defectors, announced on social media that he would not return to Congress next year. His departure follows his defeat in the primary election by Ed Gallrein, a candidate backed by Trump. Massie stated that the House was sending a message to “end this war,” underscoring the personal and political stakes attached to the legislative rebuke.

Despite the House approval, the resolution faces an uncertain future. The Senate passed a similar measure in May, but it must now consider the version advanced by the House. Even if the Senate approves the bill, President Trump is expected to veto it. Overriding such a veto would require a two-thirds majority in both chambers, a threshold that remains difficult to achieve given the current composition of Congress.