When targeted by nationwide protests early this year, Iran’s Supreme Leader Ayatollah Ali Khamenei unleashed the bloodiest crackdown of his nearly four decades in power. But now a US or Israeli military strike may have ended his rule.There was no immediate Iranian comment about him Saturday after US President Donald Trump said Khamenei was dead. Israeli officials also told reporters earlier that he was killed in a major new attack by US and Israeli forces.The 86-year-old Khamenei tried to...