The US Senate has passed a resolution directing President Donald Trump to end US military operations against Iran, in a rare bipartisan challenge to the White House amid ongoing tensions with Tehran.
The measure, approved by a 50–48 vote in the Republican-controlled chamber on Tuesday, reflects growing unease in Congress over the scope and legality of US military engagement in Iran following strikes carried out earlier this year.
The resolution had already cleared the House of Representatives with support from some Republicans. As a concurrent resolution, it does not require presidential approval and carries limited and disputed legal force.
Despite its symbolic nature, the vote underscored a notable split within the Republican Party, with several lawmakers breaking ranks to join Democrats in invoking congressional war powers authority. The move highlights increasing scrutiny of US military operations in Iran, which began after coordinated US and Israeli strikes in February.
President Donald Trump dismissed the Senate action, calling it “poorly timed and meaningless” and accusing lawmakers of complicating ongoing negotiations with Tehran.
“So, I have Iran on the ‘ropes,’ ready to go down for the fall… and the US Senate decides to have a poorly timed and meaningless War Powers Act Vote,” Trump said on his Truth Social platform. He added that the decision “made my job more difficult,” but insisted he would still “get it done.”
House Speaker Mike Johnson, a Trump ally, also criticized the resolution, warning it represented a “very dangerous prospect” while diplomatic efforts remain underway.
Public sentiment appears divided over the conflict. A recent Reuters/Ipsos poll found that three in four Americans believe the war with Iran has not been worth the costs, while most respondents expressed doubt that any ceasefire or truce would hold.
Some Republicans have also voiced concern over the financial and strategic burden of continued military action, while Democrats argue the administration exceeded constitutional limits by initiating strikes without congressional authorization.
Meanwhile, the Trump administration continues negotiations aimed at converting a preliminary understanding with Tehran into a broader agreement covering Iran’s nuclear program, sanctions relief, and maritime access through the Strait of Hormuz. Talks remain ongoing.