US Senate moves forward with plan to halt Iran war without Congress backing

The US Senate advanced a war-powers resolution on May 1, requiring President Donald Trump to seek congressional authorization for continued military action against Iran within 80 days. The procedural vote passed 50-47, with four Republicans joining all but one Democrat in favor, including Senators Rand Paul, Susan Collins, Lisa Murkowski, and Bill Cassidy. Three Republicans missed the vote, while Democratic Senator Tim Kaine of Virginia, the resolution’s sponsor, argued that Trump’s rejection of diplomatic proposals without consulting Congress violated constitutional war-declaration powers. The resolution must still pass the Republican-led House and secure two-thirds majorities in both chambers to override an expected Trump veto. Democrats and some Republicans argue that Trump’s May 1 declaration of a ‘terminated’ conflict—while US forces continue blockading Iranian ports and striking ships—demonstrates the need for congressional oversight. Republicans counter that Trump’s actions fall under the commander-in-chief authority to conduct limited military operations without formal authorization. This marks the second Senate war-powers vote since the February 28 conflict escalation, following a 60-day deadline under the 1973 War Powers Act. Trump’s administration maintains the conflict is legally resolved, but critics note ongoing military engagements contradict his claims. Previous attempts to advance similar resolutions in the Senate and House this year were blocked by Republicans, who accuse Democrats of partisan opposition to Trump’s leadership.