The U.S. Senate has approved a war powers resolution directing President Donald Trump to halt U.S. military involvement in Iran, marking a significant congressional challenge to the administration’s foreign policy. The measure passed the Senate in a 50-48 vote after previously clearing the House of Representatives, reflecting growing concern among lawmakers about the ongoing U.S.-Iran conflict.
The resolution follows the military campaign that began on February 28, when the United States and Israel launched attacks against Iran. While the measure is largely symbolic and faces uncertain legal standing, it represents the first time since the War Powers Act of 1973 that both chambers of Congress have passed legislation seeking to remove U.S. armed forces from active hostilities.
The vote highlighted increasing divisions within the Republican Party. Four Republican senators—Susan Collins, Rand Paul, Bill Cassidy, and Lisa Murkowski—joined nearly all Democrats in supporting the resolution. Democratic Senator John Fetterman voted against the measure, while two Republican senators were absent.
President Trump dismissed the resolution as “poorly timed and meaningless,” arguing that it complicates ongoing efforts to negotiate peace with Iran. The White House maintains that the War Powers Act is unconstitutional and insists the resolution carries no legal force because it does not require presidential approval. Administration officials also argue that hostilities effectively ended with a ceasefire reached on April 7.
Legal experts remain divided over the resolution’s enforceability. A 1983 Supreme Court ruling suggested that congressional measures require presidential signature or veto to become legally binding, creating uncertainty over the authority of war powers resolutions. Many analysts believe the issue could ultimately be decided in federal courts.
The Senate vote comes amid declining public support for the conflict. A recent Reuters/Ipsos poll found that only one-quarter of Americans believe the war with Iran was worth its cost, while most respondents expressed concern that any ceasefire agreement may not endure.
Lawmakers are also preparing to review future peace negotiations with Tehran, particularly if they involve Iran’s nuclear program. Congressional leaders have indicated that any major Iran peace agreement is likely to face formal review and a vote in Congress, ensuring continued debate over U.S. policy toward Iran.


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