• Four Republicans join Democrats in procedural vote against president’s stance on Iran
• Lawmakers cite Constitution giving Congress authority to declare war

WASHINGTON: The US Senate advanced a war-powers resolution on Tuesday that would end the Iran war unless President Donald Trump obtains Congress’ authorisation, a rare rebuke of the Republican leader 80 days after US and Israeli forces began striking Iran.

The vote on a procedural measure to advance the resolution was 50 to 47, as four of Trump’s fellow Republicans voted with every Democrat but one in favour. Three Republicans missed the vote.

The result was a victory for lawmakers who have been arguing that Congress, not the president, should have the power to send troops to war, as spelled out in the Constitution. However, it was only a procedural vote, and the resolution faces steep hurdles before going into effect.

Even if it eventually passes the 100-member Senate, the resolution must also pass the Republican-led House of Representatives and garner two-thirds majorities in both the House and Senate to survive an expected Trump veto.

Democratic Senator Tim Kaine of Virginia, who sponsored the resolution, said a ceasefire offered Trump an ideal opportunity to make his case to Congress as the president has said Tehran has made a new proposal to end the US-Israeli war that began on February 28.

“That’s the perfect time to have a discussion before we start up war again. The president is receiving peace and diplomatic proposals that he is throwing into the trash can without sharing them with us,” Kaine said during debate before the vote.

Trump’s Republicans blocked seven previous attempts to advance similar resolutions in the Senate this year. They have also stopped three war-powers resolutions by narrow votes in the House this year.

Senator John Fetterman of Pen­nsylvania was the only Democrat to vote against the measure. Republicans Rand Paul of Kentucky, Susan Collins of Maine and Lisa Murkowski of Alaska voted in favour, as did Senator Bill Cassidy of Louisiana, days after he lost his primary to an opponent backed by Trump.

The war-powers vote was the second in the Senate since the conflict hit a deadline on May 1, 60 days after Trump formally informed Congress that the conflict had started, for Trump to come to Congress about the war.

Under a 1973 US war-powers law passed in response to the Vietnam War, a US president can wage military action for only 60 days before ending it, asking Congress for authorisation.

Published in Dawn, May 21st, 2026