Fresh drama has erupted around the U.S.-Iran talks after President Donald Trump issued a new warning to Iran, saying Tehran should “watch its mouth” or risk losing the rest of the country. The remarks came after comments by Iranian President Masoud Pezeshkian and amid sensitive negotiations involving Foreign Minister Abbas Araghchi. Trump's threat has raised fresh questions over the future of the peace process and whether tensions could once again spiral into military confrontation. With diplomacy hanging in the balance, are the Swiss talks approaching a breakthrough or a collapse?