In a 50-47 vote, the Senate has advanced a War Powers resolution that would prohibit President Donald Trump from acting unilaterally in combat operations against the Islamic Republic of Iran.
BREAKING: After 7 failed attempts, the US Senate has advanced a measure that would require congressional approval for continued military strikes on Iran.
— The Kobeissi Letter (@KobeissiLetter) May 19, 2026
In a 50-47 vote, the Senate has now officially advanced the Iran War Powers Resolution.
🚨 JUST IN: The US Senate ADVANCES anti-Trump Iran War Powers Resolution, 50-47, after RINO BILL CASSIDY and other Republicans joined Democrats — rebuking the Iran war
— Eric Daugherty (@EricLDaugh) May 19, 2026
REPUBLICAN YEAs:
- Cassidy
- Rand Paul
- Lisa Murkowski
- Susan Collins
FETTERMAN sided with Trump.
The 8TH… pic.twitter.com/UvnWA9X6Xc
🚨For the first time, the Senate has voted to hold a debate on a war powers resolution to end the Iran war.
— Jamie Dupree (@jamiedupree) May 19, 2026
4 GOP 'Yes' votes: Cassidy LA, Collins ME, Murkowski AK, & Paul KY
1 Dem 'No' vote: Fetterman PA
A defeat for Trump and GOP leaders. pic.twitter.com/F3qjZFFmgF
Four Republican senators defected from the party line to advance the resolution: Sens. Rand Paul, Lisa Murkowski, Susan Collins, and Bill Cassidy. One Democrat, Sen. John Fetterman, joined with Republicans in an attempt to strike down the resolution.
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Cassidy’s decision to split from Trump comes after his historic primary loss to Trump-endorsed Rep. Julia Letlow and John Flemming took place on Saturday. Cassidy was the first incumbent Senate Republican to have lost a primary election since 2012.
The vote was procedural and will require further debate and voting to become law. Some GOP senators, including staunch Trump-critic Thom Tillis and Texas Sen. John Cornyn did not vote on the issue. Close Trump-ally Tommy Tuberville also did not cast a vote.
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