Mojtaba Khamenei, widely seen as Iran's next Supreme Leader, has issued a sharp warning to the United States, accusing Washington of breaking its commitments and declaring that Iran will respond to what it calls continued American aggression. He also questioned the credibility of US President Donald Trump, saying his assurances carry no value. The exchange comes as military tensions between the two countries continue to rise, raising concerns over the future of diplomacy, regional stability, and global energy security.