The United States Senate has passed a war powers measure calling on President Donald Trump to halt military operations in Iran or seek explicit approval from Congress before continuing any further action, marking a rare bipartisan challenge to the administration’s foreign policy.
The resolution, which passed the Senate by a narrow 50–48 vote, reflects growing unease in Washington over the prolonged conflict with Iran.
A small group of Republican senators joined Democrats in supporting the measure, signalling divisions within President Trump’s own party as the war nears its fifth month.
The measure had already been approved by the House of Representatives earlier this month, making it the first time since the War Powers Resolution of 1973 that both chambers of Congress have passed a concurrent resolution seeking to end a military engagement.
However, the decision remains largely symbolic, as it does not require presidential approval and carries no force of law.
Under the US legislative system, concurrent resolutions express the position of Congress but are not binding in the same way as legislation signed by the president.
The vote comes amid growing political debate in Washington over the scope of presidential war powers and the limits of executive authority in ongoing military operations.
It also reflects concerns among lawmakers about the economic and political costs of the Iran conflict, including rising fuel prices and regional instability.
A White House official maintained that the resolution has limited practical effect, arguing that a ceasefire agreement reached in April means there are no active hostilities requiring troop withdrawal. The administration also noted that some Republican senators were absent during the vote, which may have influenced the outcome.
Among Republicans who supported the measure were Senators Rand Paul, Lisa Murkowski, Susan Collins and Bill Cassidy, who joined Democrats in calling for greater congressional oversight of the conflict. Only one Democrat, Senator John Fetterman, opposed the resolution.
The vote highlights growing ideological differences within the Republican Party, particularly as lawmakers prepare for upcoming midterm elections that will determine control of Congress.
President Trump strongly criticised the decision, describing it as poorly timed and counterproductive to ongoing diplomatic and military efforts.
In comments posted on his social media platform, he argued that the Senate vote complicated efforts to manage the situation in Iran, while insisting that his administration would continue its strategy.
Despite its symbolic nature, analysts say the resolution reflects broader public and political pressure to end US involvement in the conflict.
Middle East observers note that congressional action of this kind, even without legal force, signals shifting sentiment in Washington regarding foreign military engagements.
The Pentagon has also reportedly requested significant additional funding to support ongoing operations linked to the Iran conflict, further intensifying scrutiny from lawmakers over war expenditures.
Federal law generally requires congressional authorisation for sustained military action beyond 60 days, although the administration has argued that a ceasefire agreement signed earlier this year reset the legal timeline.
The White House also retains authority to extend military action under national security provisions.
The latest vote underscores long-standing tensions between Congress and the executive branch over war-making powers, an issue that has resurfaced repeatedly in recent decades.
It also highlights increasing partisan and intra-party divisions over US foreign policy direction in the Middle East.
While the resolution is not expected to change immediate policy on the ground, it adds political pressure on the administration as it continues negotiations with Tehran under a memorandum aimed at ending Iran’s nuclear programme and securing a broader peace framework.
