Ayatollah Ali Khamenei, who reigned as Iran’s supreme leader for the past 36 years, was killed in a sweeping U.S. and Israeli attack on the country Saturday. He was 86. President Donald Trump announced his death on social media and state TV later confirmed it. To Khamenei’s critics, he was a despot who consolidated power over nearly four decades, bolstered the Islamic Revolutionary Guard Corp to become the most powerful military and economic force in the country, and clung to power in his final days with a brutal crackdown on anti-government protesters that killed thousands. To his supporters, he will be revered as a martyr who stood up to the aggression of the U.S. and Israel, which he said should be wiped off the map. His death leaves a nation that he ruled with an iron grip for decades unmoored, possibly heading to a period of great turmoil.…