U.S. negotiators are ready to hold another round of talks with Iran on Friday in Geneva if they receive a detailed Iranian proposal for a nuclear deal in the next 48 hours, a senior U.S. official told Axios on Sunday morning. Why it matters: The current diplomatic push is likely the last chance President Trump will give Iran before launching a massive U.S.-Israeli military operation that could directly target Supreme Leader Ali Khamenei, U.S. officials say. State of play: The senior U.S. officia...