The following is the transcript of the interview with Mike Waltz, U.S. ambassador to the United Nations, that aired on "Face the Nation with Margaret Brennan" on April 19, 2026.

MARGARET BRENNAN: Imtiaz Tyab reporting from Dubai. We turn now to the U.S. Ambassador to the United Nations, Mike Waltz, who joins us this morning from New York. Welcome back to Face The Nation, ambassador. 

AMBASSADOR MIKE WALTZ: Thank you, good to be with you. 

MARGARET BRENNAN: So the President said Iran broke the ceasefire, but he is still offering them a deal. Is this a presentation of terms, or should we expect an actual, prolonged negotiation?

MIKE WALTZ: Well, I think this will be a continuation of the terms that the vice president offered a week ago. And look, we have to take a step back here in that - President Trump, the US Navy is controlling what is coming out of the straits. We've had the highest level engagement in the history of the Iranian regime, with the vice president leading. We have historic ceasefire talks going on between the Israelis and the Lebanese. The markets are up. Oil prices are relatively stable. The Iranian economy is devastated, and they've never been, I can tell you here at the United Nations, they've never been more diplomatically isolated. So Iran does not have the cards, and we are confident they will come to the table and finally give up their obsession with having a nuclear weapon.

MARGARET BRENNAN: Well, Iran has not yet announced that it's sending a delegation to Islamabad. I know there's this back and forth all morning long about whether the vice president would be leading it or not. CBS, as you just heard, is reporting he will be but why is it important that he be there in person? Is it because Iran has refused to send anyone with decision making authority, unless he is there?

MIKE WALTZ: Well, you've seen the chaos, I mean that you just pointed to on the Iranian side. The last 48 hours, you have their foreign minister announcing that they're going to stop attacking shipping. Then you have the IRGC saying that they will and then doing so, as President Trump pointed out, an absolute violation. So the Iranian side is in a bit of chaos. This is absolutely due to the devastating strikes on their leadership. But I think the vice president leading shows the level of engagement from the US side that we are absolutely serious. And I for one, thank God for future generations that we are arresting a problem before it's too late. We're not waiting until the US has no options -- 

MARGARET BRENNAN: Well --  

MIKE WALTZ: and Iran has some kind of breakout, which would lead to a nuclear breakout all over the Middle East.

MARGARET BRENNAN:  Let me follow up on what you just said, though, because that's important, the Iranian side is in chaos. So how do you know you're negotiating with the right person? It's been reported, The Institute for the Study of War says that the IRGC Commander General the Vahidi has secured control over the negotiations and the military within the past 48 hours. Does that mean Foreign Minister Araghchi is not the person to be sitting across the table from? Who's in charge?

MIKE WALTZ: Well, look - again the Iranian regime, we've put them in chaos, but at the same time, we are never going to take an approach of trust. Any deal that comes out of this will have to absolutely be verifiable and be enforceable. I can tell you, from sitting in my seat at the UN we've been in extensive discussions with the International Atomic Energy Agency, the IAEA, which would have ostensibly a key role in ensuring Iran lives up to any deal that it signs to, this - signs up to, there is no trust on this side. There is verified and enforceable provisions that are that are on the table from the US to ensure they never have a nuke.

MARGARET BRENNAN: Okay, that's important in terms of enforcement. Does that mean if you actually get to a negotiated deal, and the UN's nuclear watchdog would be very much in those details of going in and perhaps securing that enriched uranium. Does this mean you're going to put a deal for approval before the United Nations? Is it going to be codified like that?

MIKE WALTZ: Well, I'll tell you, there are dozens and dozens of resolutions over the years, not just the United States, the entire world, saying Iran cannot have a nuclear weapon. 

MARGARET BRENNAN: Right.

MIKE WALTZ: We had snap back provisions that are in place now for global sanctions and that Iran cannot enrich so anything that would would change those resolutions would then need to come back before but let's not get ahead of ourselves. Let's see if the Iranians actually sign up to a very reasonable offer that is sitting on the table from the United States -- 

MARGARET BRENNAN: Yeah -- 

MIKE WALTZ: which is an off ramp from them, and also will ensure the region, the United States, Europe and the world, is never threatened by a regime with its hand on a nuclear button.

MARGARET BRENNAN: Okay, so, but back to the point of who's in charge. President Trump says he hopes they take the deal, that was the post this morning. But on Friday afternoon, he spoke to my colleague, Weijia Jiang, and he gave us an incredibly optimistic read. He said Iran had quote, agreed to everything, including to stop enriching uranium forever and to stop backs - backing all proxy groups like Hezbollah. He made it sound like it's all been sorted out. So which is it? Was there an agreement with certain parts of the Iranian government, but now there are others in charge, or was he just, you know, I don't know, speculating about something he hopes comes true?

MIKE WALTZ: Margaret, anybody who has dealt with the Iranians will tell you it is often two steps forward, three steps back. They're incredibly slippery. They can't be trusted. They cheated over the years, which is one of the reasons that President Trump withdrew us from the JCPOA. They were hiding sites. They were hiding capabilities, and this is why he made the bold decision -- 

MARGARET BRENNAN: Yep -- 

MIKE WALTZ: last year in operation midnight hammer, to just end it once and for all. And again, we have to take the perspective that we're not waiting. We're not trusting. We are reducing their capabilities. Their military is in shambles. Their missile program is in shambles, and now, hopefully diplomatically, they will do it the easy way, rather than the hard way, of finally giving up on this illegal ambition.

MARGARET BRENNAN: The Defense Intelligence Agency told Congress this past week, Iran has thousands of missiles and one way attack drones that can still threaten the United States. So there's still a threat in certain ways. General Caine said on Thursday, the US is going to pursue Iranian flagged vessels or any vessel providing support, including those carrying Iranian oil. Beijing is the top customer. Are you going to start boarding vessels headed to to China? When do these operations begin?

MIKE WALTZ: Well, I'm not going to give - get into operational timelines, but I'll tell you all options are on the table. The President is prepared to escalate, to de-escalate, he means it. When he said nothing that benefits Iran is coming out of the strait. And then on top of that, Secretary Bessent announced operation economic fury, where we are prepared to put secondary sanctions on banks who are transacting in illegal Iranian oil dollars. So we are truly putting maximum pressure on every aspect of the Iranian economy, and at some point they are going to see some level of common sense and pragmatism and say enough is enough with this nuclear obsession.

MARGARET BRENNAN: Is that the first step before you go back to combat? Because President Trump was talking about bombing power plants. Are the sanctions and the seizing of vessels --  

MIKE WALTZ: Well, we've taken --  

MARGARET BRENNAN: step one?

Mike Waltz: Well we've taken, you know, again, I'm not going to publicly sequence the steps, but the blockade was, was a tremendous step and has been tremendously effective, with dozens of ships turned around. Others that are already out on the water, our Pacific Command is prepared to interdict. We're going after the banks. We're going after this shadow fleet, one of which was run by a relative of Khamenei. So we are taking a number of steps. We're even looking - our acting attorney general has made it very clear, he is going to start aggressively prosecuting, our threat finance unit is going -- 

MARGARET BRENNAN: Yeah --  

MIKE WALTZ: after their illegal dollars. So this is a whole of government, full on press. I hope we don't have to go back to a military option but President Trump's made it very clear. And by the way, bridges, power plants that are run by the IRGC, which runs the entire military, are absolute legitimate military targets, not only now, but have been historically. That is a false, fake and ridiculous notion that this is some type of war crime.

MARGARET BRENNAN: Well, we'll talk about that, and we'll see if that happens. But Germany and other allies have said they will help the United States with that navigation through the Strait of Hormuz, eventually, once combat ends, but they said they need cover. They need an international mandate at the United Nations. Will Russia and China get on board? Are you trying to do that at the UN?

MIKE WALTZ: Well, as our Gulf Arab allies made it very clear at the UN, I guess that would be nice to have after the conflict, but they need help and are ready to take action now, particularly Bahrain, UAE, Qatar, Kuwait, Saudi Arabia, we had a historic resolution to the UN with 135 -- 

MARGARET BRENNAN: Yeah -- 

MIKE WALTZ: nations condemning Iran for its attacks on civilian infrastructure, on resorts, civilian airports, ports, shipping. That was truly tremendous. It's disappointing the Russians and Chinese chose to side with Iran rather than our Gulf Arab allies -- 

(CROSSTALK BEGINS)

MARGARET BRENNAN: And you still lifted sanctions on Russia. 

(CROSSTALK ENDS) 

MIKE WALTZ: and freedom of navigation, but you're going to see - yeah, you're going to see continued action this coming week. The entire world is united that you - that a country cannot hold an international waterway and cannot hold the world's economies hostage because it has a conflict with another country. You don't see that in the Straits of Gibraltar, the Bering Strait, the Straits of Malacca, or any other international waterway. Iran is absolutely in the wrong here from a legal, diplomatic and economic standpoint.

MARGARET BRENNAN: Let me ask you about Lebanon. President Trump posted Friday that quote, Israel will not be bombing Lebanon any longer. They are prohibited from doing so by the USA. Enough is enough. How is the US prohibiting ally Israel from bombing in Lebanon? And what is the United States doing to confiscate weapons from Hezbollah like, how are you helping the Lebanese military do that?

MIKE WALTZ: Well to answer your last question, first, the US contributed over $250 million to the Lebanese Armed Forces. This is a tremendous historic opportunity for Lebanon, the Lebanese government led by President Aoun, a former general, the head of the Lebanese Armed Forces, to take their country back. Finally, with Iran on its back foot and militarily devastated, with Syria -- 

MARGARET BRENNAN: Yep.

MIKE WALTZ: in a much better place, with the fall of the Assad regime and the effective diplomacy that we've had there, and from the pager and beeper operation to now, Hezbollah has never been in a worse place. This is a true moment, and it was a real honor for me to be at the opening of the -- 

MARGARET BRENNAN: Yeah.

MIKE WALTZ: first Israel - Israel Lebanon talks, first ever -- 

MARGARET BRENNAN: How are you going to prohibit Israel from bombing?

MIKE WALTZ: in modern history. So, we have - look, but Maragaret, we have diplomacy on the march in a number of places -- 

MARGARET BRENNAN: Uh-huh.

MIKE WALTZ: Backed, of course, by military strength -- 

MARGARET BRENNAN: Okay.

MIKE WALTZ: but we have to take a moment to understand the magnitude of what's going on.

MARGARET BRENNAN: Ambassador Waltz, we will be watching to see what happens in the coming days. Thank you for your time. This morning, Face the Nation will be back in a minute. Stay with us.