On 23 June 2026, the US Senate passed a war powers resolution by 50 votes to 48, ordering Donald Trump to end military operations against Iran. Four Republican senators broke ranks to vote with the opposition. It marked the first time since the War Powers Act was adopted in 1973 that both chambers of Congress jointly approved a measure directing a president to halt an ongoing military action.
The legal reach of the vote is limited. It is a concurrent resolution with no direct binding force: it is not sent to the White House for signature, and the administration immediately declared the War Powers Act unconstitutional. Trump called the vote "badly timed and meaningless," while acknowledging that it complicates his task as negotiations proceed with Tehran.
The vote falls within a conflict opened on 28 February by US-Israeli strikes carried out without prior congressional authorization. After four months of hostilities that disrupted traffic in the Strait of Hormuz and pushed Brent crude to roughly 125 dollars a barrel, a preliminary memorandum was signed on 17 and 18 June, opening 60 days of talks. A request to Congress for 87.6 billion dollars to fund the war adds a budgetary dimension to the institutional crisis.
Several points remain disputed. Some actors frame the resolution as a lasting constitutional precedent; others stress its symbolic character, especially as the Senate reversed course by 25 June. The parties also offer conflicting accounts of the agreement's terms and of nuclear inspections. In the background, polls show only 24 percent of Americans consider the conflict justified, and November's midterm elections weigh on lawmakers' calculations.
