President Donald Trump said over the weekend that Iran’s new leadership has made overtures to restart diplomatic negotiations with the U.S. — which he plans to accept — after Iranian Supreme Leader Ayatollah Ali Khamenei was killed during Israeli and U.S. strikes in the country. 

Still, the president warned that strikes would continue until their objectives had been achieved. 

Trump made the comments while speaking to The Atlantic on Sunday morning, one of a series of interviews he gave after launching a joint military operation against Iran alongside Israel on Saturday. The president has been touting Operation Epic Fury to journalists as an immediate success, arguing that the removal of Khamenei and 47 others in senior Iranian leadership has provided a window for diplomacy as the U.S. military operation swiftly advances.

“They want to talk, and I have agreed to talk, so I will be talking to them,” Trump told The Atlantic. “They should have done it sooner. They should have given what was very practical and easy to do sooner. They waited too long.”

The commander-in-chief declined to say when he plans to begin engaging with the Iranians, instead noting that most of the Iranians involved in past negotiations with the U.S. are now deceased.

“Most of those people are gone. Some of the people we were dealing with are gone, because that was a big — that was a big hit,” Trump said. “They should have done it sooner. They could have made a deal. They should’ve done it sooner. They played too cute.”

Asked if he was willing to extend the bombing campaign in order to support a popular uprising in Iran, should it unfold, the president was similarly coy, telling the outlet: “I have to look at the situation at the time it happens … You can’t give an answer to that question.”

In a video posted to his Truth Social platform on Sunday afternoon, however, Trump spoke directly to the protesters, calling upon “all Iranian patriots who yearn for freedom to seize this moment, to be brave, be bold, be heroic and take back your country. America is with you. I made a promise to you, and I fulfilled that promise. The rest will be up to you, but we’ll be there to help.”

Further illuminating his thinking, Trump wrote on Truth Social on Saturday shortly after the killing of Khamenei, “We are hearing that many of their IRGC, Military, and other Security and Police Forces, no longer want to fight, and are looking for Immunity from us … Hopefully, the IRGC and Police will peacefully merge with the Iranian Patriots, and work together as a unit to bring back the Country to the Greatness it deserves. That process should soon be starting.” 

“The heavy and pinpoint bombing, however, will continue, uninterrupted throughout the week or, as long as necessary to achieve our objective” of world peace, he wrote.

In an interview on Saturday evening with CBS News’ Robert Costa, Trump said he believes that the joint U.S.-Israeli attacks on Iran that killed Khamenei made diplomacy “much easier now than it was a day ago, obviously, because they are getting beat up badly.”

As for the military operation itself, Trump suggested in subsequent conversations on Sunday with The Daily Mail and The New York Times that the U.S. could be involved for another four to five weeks. 

“It’s always been a four-week process. We figured it will be four weeks or so,” Trump told the U.K. tabloid. “It’s always been about a four week process so — as strong as it is, it’s a big country, it’ll take four weeks or less.”

He repeated the four to five week timeline in interviews with Axios’ Barak Ravid on Saturday and The New York Times on Sunday.

“I can go long and take over the whole thing,” Trump told Ravid by phone, “or end it in two or three days and tell the Iranians: ‘See you again in a few years if you start rebuilding [your nuclear and missile programs].’”

Trump later predicted to Ravid that, “In any case, it will take them several years to recover from this attack.”

Senate Intelligence Committee Chairman Tom Cotton (R-AR) echoed the president’s predictions, telling CBS’ “Face the Nation” on Sunday that Trump has “no plan for any kind of large-scale ground force inside Iran.”

“The president has been clear that what we should expect to see is an extended air and naval campaign that’s designed not only to continue to set back Iran’s nuclear ambitions, but most importantly, to destroy its vast missile arsenal, many more missiles than the United States and Israel have air defenses combined, as well as the missile launchers and its missile manufacturing capability,” said Cotton, one of the president’s more hawkish GOP allies on Capitol Hill. 

“Now obviously one risk of that kind of campaign is that an aircraft could be shot down, and the president would never leave a pilot behind,” he continued. “So no doubt we have combat search and rescue assets in the region that are prepared to go in and extract any downed pilot. But barring that kind of unusual circumstance, the president has no plan for any kind of large-scale ground force inside of Iran.”