WASHINGTON, D.C. — Senator Bill Cassidy, a Republican from Louisiana, recounted a confrontation with President Trump regarding war policy and his subsequent participation in a classified White House briefing during an appearance on "Face the Nation with Margaret Brennan" on June 28, 2026. Cassidy initially opposed military action without congressional approval but stated he regained trust after the briefing.

The U.S. launched a war with Iran four months prior to the broadcast. Iran had attacked U.S. Gulf allies in Bahrain and Kuwait, prompting the U.S. to strike Iranian missile sites and other targets. Before the briefing, President Trump met with Republican senators on Capitol Hill. Cassidy was one of four Republican senators who voted with Democrats against launching the war without congressional approval. Following the meeting, Cassidy received a private White House Situation Room briefing with Vice President Vance and special envoy Steve Witkoff.

Cassidy voted in support of the president's war on a second measure after receiving the briefing. He described his conversation with President Trump as "positive and looking to build a working relationship." Cassidy added, "The president was berating the four people that voted for the War Powers Act. Frankly, I'm not there to be berated. And the president wasn't invited to dish out verbal abuse."

During the exchange, Cassidy recalled raising his hand and asking, "Mr. President, do you just want – is that a rhetorical question that you're asking, why do we vote for it, or are you really interested? He goes: 'I'm really interested.'" Cassidy then explained his position: "I stood up and I said: 'This is why.' And I listed those objectives that I did not see being achieved and how the kind of endpoint of the war kept stretching out longer and longer." According to Cassidy, President Trump began to speak over him, and he raised his voice to match the president's volume. "Now, I shouldn't have lost my temper, nor should he, but, you know, my wife will tell you, every now and then, my Irish temper gets the best of me, but point being, I needed to know. I need to know to serve my people in my state and my country," he said.

Cassidy said he felt he had "actually accomplished the mission of what I needed to do" after the briefing. He indicated that officials informed him that negotiations were delicate. "When I asked about that in my briefing, they said, right now, the negotiations are delicate and they could collapse if they're not nursed along in the appropriate way. I can accept that. Sometimes, you have to have some space for people to come to an accommodation. That's the reason they said for their kind of lack of being forthcoming. I can accept that," Cassidy said. He noted the U.S. spent $29 billion and has 13 American fatalities in the conflict. He expressed hope that the U.S. can return to the status quo ante. He also stated that a medium-sized power is perceived to have fought a superpower to a draw.