CNN —Once seen as a likely successor to Iran’s Supreme Leader, President Ebrahim Raisi has died in office, leaving the Islamic Republic’s hardline establishment facing an uncertain future. An ultraconservative president, 63-year-old Raisi was killed Sunday, along with Foreign Minister Hossein Amir-Abdollahian and other high-ranking officials, in a helicopter crash in Iran’s remote northwest. Raisi’s death has raised questions about who will eventually succeed Iran’s 85-year-old Supreme Leader Ayatollah Ali Khamenei, the most powerful man in the country. According to the constitution, the 88-member Assembly of Experts picks the successor to the Supreme Leader after his death. “(This) definitely throws all the plans that offices of the Supreme Leader probably had out the window,” Vaez told CNN’s Paula Newton.

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