Iran's government is engulfed in its gravest leadership crisis in years after reports that President Masoud Pezeshkian has submitted his resignation, accusing the Islamic Revolutionary Guard Corps of seizing control of the state. Tehran flatly denies it. But the very intensity of the denials, and the substance of the alleged complaint, point to a rift at the top that the regime is struggling to contain. The London-based opposition outlet Iran International, citing a single anonymous official, reported on Sunday that Pezeshkian sent a formal letter to the office of Supreme Leader Mojtaba Khamenei asking to step down. According to that account, the president wrote in unusually sharp language that the state's management structure had "effectively gone off the official tracks" and that key levers of power now sit under the full control of a group of IRGC commanders. He said he and his cabinet had been cut out of vital decisions and could no longer govern. The reported tri...