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◆ Mixed look for CassidyForeign Policy

Iran War Powers Resolution: Full List of Republicans Who Voted Against Donald Trump

Cassidy joined three other Republican senators in supporting the resolution to restrict further U.S. military action against Iran.

Iran War Powers Resolution: Full List of Republicans Who Voted Against Donald Trump
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Outlet credibilityNewsweek75/100 HIGH
This article1 analysis · Oct 5, 2026
Newsweek
Jun 23, 2026
tl;dr

The Senate passed a resolution seeking to halt further U.S. military action against Iran without congressional authorization, with four Republican senators joining Democrats. The vote drew President Donald Trump’s criticism and was described as nonbinding.

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42 VOTES
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Bill Cassidy R · LA · SEN
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Bill Cassidy
R · LA · SEN

Senator who voted for the Iran war powers resolution

PRIMARY SUBJECT
Lisa Murkowski
R · AK · SEN

Senator who voted for the Iran war powers resolution

Murkowski's version of this story ↗
Susan M. Collins
R · ME · SEN

Senator who voted for the Iran war powers resolution

Collins's version of this story ↗
Rand Paul
R · KY · SEN

Senator who voted for the Iran war powers resolution and advocated diplomacy

Paul's version of this story ↗
Donald Trump
R · President of the United States

President whose Iran policy the resolution challenged

Mitch McConnell
R · KY · SEN

Senator who missed the vote

John Fetterman
D · PA · SEN

Senator who voted against the resolution

David McCormick
R · PA · SEN

Senator who missed the vote

Ted Cruz
R · TX · SEN

Senator who criticized the advice Trump was receiving

Part of a bigger story

25 OUTLETS
Bill Cassidy Votes Against Advancing Iran War Powers Resolution

The Senate blocked a later Iran war-powers resolution from advancing, and Cassidy voted against it after previously supporting a similar measure. Reports say he changed position after a White House briefing. Left-leaning outlets portray the reversal as capitulation to Trump’s pressure. Center outlets focus on the vote and Cassidy’s reversal after a briefing, often placing it amid his clash with Trump. Right-leaning outlets more often cast the rejection as a win for Trump, though some emphasize the pressure and vote change.

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