A tense confrontation between President Donald Trump and Sen. Bill Cassidy (R-La.) during a closed-door Republican luncheon on Capitol Hill appears to have been followed by a thaw in relations after two Republican senators changed their positions on a resolution seeking to limit the president’s authority regarding military action against Iran.
Late Wednesday, Trump celebrated the outcome on Truth Social after the Senate’s vote shifted.
“Wow!” the president wrote. “The Senate just changed its vote on Iran from 50-48 against, to 50-47 for. Rand Paul and Bill Cassidy changed. Thank you to Leader John Thune, Lindsey Graham, Bernie Moreno, and all. This vote puts Iran on notice!”
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President Trump celebrates a key Senate vote flip on Iran, shifting from 50-48 against to 50-47 in favor after Senators Rand Paul and Bill Cassidy changed their positions.… pic.twitter.com/m8K57qfdTF— Commentary Donald J. Trump Posts From Truth Social (@TrumpDailyPosts) June 25, 2026
The resolution, introduced by Sen. Tim Kaine (D-Va.), sought to require the president to obtain explicit congressional authorization for continued military action against Iran or withdraw U.S. armed forces from hostilities. Supporters argued the measure would reaffirm Congress’s constitutional role in authorizing war, while opponents contended it could undermine the president’s flexibility during a rapidly evolving national security situation.
According to reports from the closed-door luncheon, Trump questioned why any Republican would support the resolution.
Tonight I will vote present on the War Powers resolution.
My opinion on the debate over war and executive power has not changed and I have voted that way several times.
But since hostilities seem to be over and the President asked me to give consideration to his…
— Rand Paul (@RandPaul) June 25, 2026
“I stood and said, ‘Is that a rhetorical question, or would you like to really know?'” Cassidy later recounted.
The exchange reportedly escalated into a heated argument between the president and the Louisiana senator, highlighting divisions within the Republican conference over executive war powers.
When the Senate voted again later that day, however, Cassidy and Sen. Rand Paul (R-Ky.) altered their positions.
Paul announced that he would vote “present” rather than support the resolution.
I support President Trump’s push for diplomacy with Iran. Endless war is not a strategy. Lasting peace requires negotiation, tradeoffs, and the courage to choose diplomacy over regime change.
— Rand Paul (@RandPaul) June 25, 2026
“Tonight I will vote present on the War Powers resolution,” Paul wrote on X. “My opinion on the debate over war and executive power has not changed and I have voted that way several times.”
He explained that recent diplomatic developments influenced his decision.
“But since hostilities seem to be over and the President asked me to give consideration to his negotiating position, I will do so. My vote of present is a way to give the President more space and leverage to negotiate a lasting peace.”
The following morning, Paul reiterated that message.
“I support President Trump’s push for diplomacy with Iran,” he wrote. “Endless war is not a strategy. Lasting peace requires negotiation, tradeoffs, and the courage to choose diplomacy over regime change.”
Cassidy likewise pointed to additional information he received from administration officials as the reason for changing his vote.
I want to thank Vice President Vance and Special Envoy Witkoff for the thorough briefing this afternoon on Iran. I appreciate the quick invitation to the White House to address many of my concerns.
— U.S. Senator Bill Cassidy, M.D. (@SenBillCassidy) June 25, 2026
“I want to thank Vice President Vance and Special Envoy Witkoff for the thorough briefing this afternoon on Iran,” Cassidy wrote on X. “I appreciate the quick invitation to the White House to address many of my concerns.”
Not every Republican changed course. Sens. Susan Collins (R-Maine) and Lisa Murkowski (R-Alaska) continued to support Kaine’s resolution, voting with Democrats as they had previously.
