Khamenei's killing has brought new urgency to the question of who will be Iran's next Supreme Leader.

The successor to Ayatollah Khomeini in 1989, Ali Khamenei embodied the Islamic Republic, setting its political course both domestically and abroad. Over the course of his rule,…

Khamenei assumed power following the death of Ayatollah Ruhollah Khomeini in 1989, inheriting a revolutionary state still consolidating itself.