Iran has named Mojtaba Khamenei as its new Supreme Leader, just over a week after the assassination of his father, Ayatollah Ali Khamenei, in United States-Israeli strikes that plunged the entire region into a sprawling war.

The 56-year-old, who will now be charged with leading the Islamic Republic through the biggest crisis in its 47-year history, was named by clerics as his father’s successor on Sunday.

Key leaders, Iran’s powerful Islamic Revolutionary Guard Corps (IRGC), and the armed forces were all quick to pledge their backing to the new leader.

Iran’s Parliament Speaker Mohammad Bagher Ghalibaf welcomed the choice, saying that following the new supreme leader was a “religious and national duty”.

Mojtaba Khamenei has never run for office or been subjected to a public vote, but has for decades been a highly influential figure in the inner circle of the supreme leader, cultivating deep ties to the IRGC.

In recent years, Khamenei has increasingly been touted as a top potential replacement for his father. His selection could be a sign that more hardline factions in Iran’s establishment retain power, and could indicate that the government has little desire to agree to a deal or negotiations in the short term as the war is in its second week.

Al Jazeera’s Ali Hashem described Khamenei as his “father’s gatekeeper”. “He adopts the positions of his father with respect to the United States, with respect to Israel. So we are expecting a confrontational leader. We’re not expecting any moderation,” he said.

“However, if this war comes to an end and he is still alive and he is able to continue running the country, there is going to be big potential … to find new routes for Iran,” said Hashem.

Rami Khouri, a Distinguished Public Policy Fellow at the American University of Beirut, said Khamenei’s appointment signalled “continuity” and that it remained to be seen whether the new supreme leader would push for negotiations to end the war.

Either way, he said, his appointment was “an act of defiance”. Iran, he added, was “telling the Americans and Israelis ‘you wanted to get rid of our system? Well … this is a more radical person than his father who was assassinated’.”

Heidari Alekasir, a member of the Assembly of Experts that was tasked with choosing the country’s supreme leader, said the candidate had been picked based on the late Khamenei’s advice that Iran’s top leader should “be hated by the enemy” instead of praised by it.

“Even the Great Satan (US) has mentioned his name,” the senior cleric said, with reference to Trump’s earlier statement that Mojtaba Khamenei would be an “unacceptable” choice for him.

Israel’s military had previously warned any successor that “we will not hesitate to target you”.

United States President Donald Trump had again promised to exert influence over who is selected as Iran’s next Supreme Leader, saying that, without Washington’s approval, whoever is picked for the role is “not going to last long”. The selection of Khamenei’s son is certain to enrage Trump.

Supreme leader not decided by ‘Epstein’s gang’

The 88-member Assembly of Experts said Sunday it “did not hesitate for a minute” in choosing a new supreme leader, despite “the brutal aggression of the criminal America and the evil Zionist regime”.

Earlier, the clerical body had indicated it had reached a majority consensus on its choice, without naming who it was, with one member saying, “the path of ⁠Imam Khomeini and ⁠the path of the martyr Imam Khamenei has been ⁠chosen. The name of ⁠Khamenei will continue.”

Ali Khamenei, who ruled Iran for 37 years, succeeding Ayatollah Ruhollah Khomeini who led the 1979 revolution, was killed in a United States-Israeli strike on Tehran on February 28, at the outset of the war which has now unleashed chaos throughout the Middle East.

The ⁠Israeli ⁠military has already threatened to kill any replacement for Khamenei, while US President Donald Trump, who had demanded a say in the nomination, said the war might only end once Iran’s military and rulers had been wiped out.

Trump said Sunday that Iran’s next leader would not “last long” without his approval. “He’s going to have to get approval from us,” Trump told ABC News. “If he doesn’t get approval from us he’s not going to last long.”

Iranian officials have rejected Trump’s push to be involved in the selection of the country’s next leader, insisting that only Iranians can decide the future of their country.

Iran’s Parliament Speaker Mohammad Bagher Ghalibaf appeared to ridicule on Friday the US president’s assertion that he wants to have a say in appointing the successor to Khamenei.

“The fate of dear Iran, which is more precious than life, will be determined solely by the proud Iranian nation, not by [Jeffrey] Epstein’s gang,” Ghalibaf wrote on X, referring to the late sex offender who had ties to rich and powerful figures in the US.

Dark skies

As clerics selected the new supreme leader, a dark haze hung over Tehran after Israel struck five oil facilities in and around the capital city overnight, setting them ablaze and filling the skies with acrid smoke.

As the war extended into its ninth day, the IRGC said they had enough supplies to continue their drone and missile war over the Middle East for up to six months.

Guards spokesman Ali Mohammad Naini said Iran had so far used only first- and second-generation missiles, but would use “advanced and less-used long-range missiles” in the coming days.

Trump again refused to rule out sending American ground troops into Iran, but continued to insist that the war was all but won despite the ongoing Iranian missile and drone strikes.

Analysts warn there is still no clear path to ending a conflict that US and Israeli officials say could last a month or longer.