Iran's Supreme Leader Mojtaba Khamenei has not approved the memorandum of understanding between the U.S. and Iran, according to reports. This lack of approval may be influencing Trump's decision to withhold his endorsement as well. The current agreement appears to be a preliminary consensus among Iranian Foreign Minister Abbas Araghchi, Parliament Speaker Mohammad Bagher Qalibaf, and U.S. Special Envoy for the Middle East Steve Witkoff. However, without the formal approval from Iran's top leadership, the memorandum remains tentative.