By Gloria Ogbonna

Sen. Bill Cassidy (R-LA) was one of four Republican senators who voted to advance a War Powers Resolution aimed at directing President Donald Trump to withdraw U.S. military forces from involvement in hostilities with Iran. The procedural vote marked a notable moment in the Senate, particularly as it came just days after Cassidy’s unsuccessful reelection bid.

Cassidy recently lost his primary race to Trump-endorsed Rep. Julia Letlow (R-LA) and Louisiana State Treasurer John Fleming, a defeat that underscored shifting political dynamics within the state’s Republican electorate. His decision to support advancing the Iran War Powers Resolution followed closely on the heels of that loss, drawing additional attention to his vote.

The Senate voted 50-47 to move the resolution out of the Senate Foreign Relations Committee and onto the floor for further consideration. Joining Cassidy in voting with Democrats were Sens. Lisa Murkowski (R-AK), Susan Collins (R-ME), and Rand Paul (R-KY). According to CBS News, this vote represented the first time Cassidy has supported advancing a war powers resolution, marking a significant shift in his previous legislative posture on such matters.

The resolution, introduced by Sen. Tim Kaine (D-VA), would direct the president to “remove the United States Armed Forces from hostilities within or against Iran” unless Congress explicitly authorizes military action through a formal declaration of war or a specific authorization for the use of military force. Supporters of the measure argue that it reinforces Congress’s constitutional authority over decisions related to war and military engagement.

While the vote to advance the resolution represents an important procedural step, it does not guarantee final passage. Even if both the Senate and House of Representatives were to approve the measure, the president would be expected to veto it. Nevertheless, Democratic lawmakers have maintained that the effort carries symbolic and political weight, suggesting it could influence broader discussions about U.S. involvement in the region.

Cassidy’s vote also adds to a history of high-profile breaks with Trump. In 2021, he was one of seven Republican senators who voted to convict Trump during the impeachment trial that followed the January 6 Capitol riot. That decision drew significant criticism from segments of the Republican base in Louisiana and became a recurring theme in subsequent political contests.

Leading up to his recent primary defeat, reports indicated tension between Cassidy and national Republican leadership. A Punchbowl News report suggested Cassidy was “furious” with the National Republican Senatorial Committee (NRSC) and Senate Majority Leader John Thune (R-SD), believing they had not provided sufficient support for his reelection campaign. Despite those frustrations, Thune was reported to have raised more than $650,000 for Cassidy at a January fundraising event in Baton Rouge.

Cassidy’s vote on the Iran War Powers Resolution, coming so soon after his electoral loss, underscores the broader divisions within the Republican Party over foreign policy, executive authority, and the legacy of Trump’s leadership.

As the resolution proceeds through the legislative process, it remains to be seen how much momentum it will gather and what impact it may ultimately have on U.S. policy toward Iran.

Source: Breitbart

Original article: https://yournews.com/2026/05/20/6988468/sen-bill-cassidy-breaks-with-gop-to-advance-iran-war/