What Happened
- Ayatollah Ali Khamenei, who served as Iran's Supreme Leader for 37 years since 1989, was killed in US-Israeli airstrikes on 28 February 2026 — the first time the head of an Islamic Republic has been killed in a foreign military strike.
- The US-Israel campaign also killed several senior succession candidates — including IRGC Commander General Mohammad Pakpour and security adviser Ali Shamkhani — severely narrowing the pool of potential successors.
- President Trump publicly stated: "The attack was so successful it knocked out most of the candidates" for the supreme leadership.
- Under Iran's constitution, a three-person leadership council held power pending the Assembly of Experts' selection of a new Supreme Leader.
- The Assembly of Experts — 88 senior clerics — selected Mojtaba Khamenei, the son of Ali Khamenei, as the new Supreme Leader on March 9, 2026, in a highly contested decision.
Static Topic Bridges
The Supreme Leader's Role in Iran's Constitutional Structure
Iran's political system is a unique hybrid: it combines elements of Islamic theocracy (based on Velayat-e-Faqih — Guardianship of the Jurist) with republican institutions (elected President, Parliament). The Supreme Leader sits atop the entire system and holds powers that supersede all elected institutions: he is Commander-in-Chief of the armed forces, controls the IRGC, appoints the heads of the judiciary, half of the Guardian Council, and the commanders of all military branches. The Supreme Leader serves for life with no term limits.
- Only two people have held the position since the Islamic Republic's founding in 1979: Ayatollah Ruhollah Khomeini (1979-1989) and Ayatollah Ali Khamenei (1989-2026).
- The Supreme Leader's decisions on nuclear policy, foreign policy, and military operations override those of the elected President and Parliament.
- Velayat-e-Faqih (Guardianship of the Jurist) is the foundational political-religious concept: the most qualified Islamic jurist should govern society in the absence of the 12th Imam (the Mahdi) — a Shia theological doctrine embedded in Iran's 1979 Constitution.
- Article 110 of Iran's Constitution lists the Supreme Leader's vast powers, including declaring war and peace.
Connection to this news: Khamenei's killing created the deepest constitutional crisis in the Islamic Republic's history — the system had no transition mechanism designed for assassination of the sitting leader, and the simultaneous killing of potential successors made the crisis acute.
The Assembly of Experts — Selecting Iran's Supreme Leader
The Assembly of Experts (Majlis-e Khobregan) is an 88-member body of clerics elected by the Iranian public every eight years but vetted by the Guardian Council. Its constitutional mandate is to elect the Supreme Leader, supervise his conduct, and dismiss him if he loses the qualifications for leadership. In practice, the Assembly has never publicly criticised, questioned, or dismissed a sitting Supreme Leader — its operations are entirely confidential.
- All Assembly candidates must be vetted and approved by the Guardian Council — half of whose members are appointed by the Supreme Leader — creating a circular self-reinforcing power structure.
- The Assembly elects a Supreme Leader from among faqihs (Islamic jurists) who meet criteria of scholarly knowledge, political acumen, administrative capacity, and religious authority.
- The succession process involves balancing factional interests within the Islamic Republic: reformists, pragmatists, and hardliners all have representation within the Assembly.
- The selection of Mojtaba Khamenei (son of Ali Khamenei) was controversial — Iran's constitution does not explicitly prohibit dynastic succession, but the Islamic Republic's founding ideology was explicitly anti-monarchical.
Connection to this news: The Assembly's March 9 selection of Mojtaba Khamenei under extraordinary wartime conditions was opaque even by Iranian standards. Analysts noted that the selection of a Khamenei family member may reflect both the war's compressive effect on factional competition and the desire for continuity in a moment of existential crisis.
Iran's IRGC — Power Within the State
The Islamic Revolutionary Guard Corps (IRGC), founded in 1979 as a guardian of the Islamic Revolution, has grown into one of the most powerful institutions in Iran — controlling vast military, economic, intelligence, and political networks. The IRGC operates parallel to (and in competition with) Iran's regular military (Artesh). It manages Iran's ballistic missile programme, overseas proxy networks (Quds Force), and a business empire estimated at 20-30% of Iran's economy through its affiliated companies.
- The Quds Force (IRGC's expeditionary arm) manages Iran's proxy relationships with Hezbollah, Hamas, Houthis, and Iraqi Shia militias — the "Axis of Resistance."
- The IRGC has been designated as a Foreign Terrorist Organisation (FTO) by the US since 2019.
- General Mohammad Pakpour (IRGC commander-in-chief, killed in the 2026 strikes) was responsible for Iran's conventional ground forces and played a key role in the nuclear programme's security architecture.
- The IRGC's political influence in Iran's government has grown since the 2009 Green Movement crackdown, with former IRGC members dominating the cabinet, Parliament, and key state enterprises.
Connection to this news: The killing of the IRGC's senior leadership alongside Khamenei created a dual crisis — ideological (who leads the Republic?) and military-operational (who commands the nuclear programme and proxy networks?). Mojtaba Khamenei's selection as Supreme Leader will now depend critically on his ability to consolidate IRGC loyalty, which has historically been a personal rather than institutional bond with the Khamenei family.
Iran's Nuclear Programme — Continuity Amid Leadership Change
Iran's nuclear programme is managed by the Atomic Energy Organization of Iran (AEOI) and protected by IRGC security structures. Its continuation does not depend on any single political leader — the technical capacity is embedded in facilities, scientists, and institutional knowledge developed over decades. However, the political decision to negotiate, halt, or accelerate enrichment has historically been the Supreme Leader's prerogative.
- Iran's Fordo enrichment facility is buried 80 meters underground — designed to be resistant to conventional airstrikes.
- Natanz (above-ground enrichment) was severely damaged in the 2026 US-Israel campaign, but Fordo's status was contested.
- Iran was enriching uranium to 60% purity — three steps below weapons-grade 90% — at the time of the conflict.
- The JCPOA's collapse (US withdrawal 2018) and Iran's subsequent "maximum resistance" to inspections mean the international community has limited visibility into Iran's current nuclear status post-conflict.
Connection to this news: The succession crisis creates an uncertain period for Iran's nuclear programme — the new Supreme Leader's decisions on reconstituting military infrastructure and any future nuclear diplomacy will shape West Asia security dynamics for decades.
Key Facts & Data
- Ayatollah Ali Khamenei: Supreme Leader 1989-2026, killed 28 February 2026 in US-Israeli airstrikes in Tehran.
- Preceded by Ayatollah Khomeini (Supreme Leader 1979-1989, Islamic Republic founder).
- Assembly of Experts: 88 members, elected every 8 years; selected Mojtaba Khamenei as new Supreme Leader on March 9, 2026.
- Interim leadership council: President Masoud Pezeshkian, Judiciary Head Gholamhossein Mohseni Ejei, senior cleric Alireza Arafi.
- IRGC Commander General Mohammad Pakpour: killed in 2026 strikes.
- Security adviser Ali Shamkhani: killed in 2026 strikes.
- IRGC designated Foreign Terrorist Organisation by US in 2019.
- Iran's enrichment level at time of conflict: 60% purity (weapons-grade: 90%).
- Fordo underground enrichment facility: buried 80 metres, designed for survivability.