Rubio: Iran only seeks to buy time

US Secretary of State Marco Rubio has issued a sharp critique of Iran's diplomatic posture, stating Tehran is only serious about finding ways to buy itself more time. In a separate comment, he asserted that hardliners with an apocalyptic vision of the future hold the ultimate power in the country. These remarks reflect the Trump administration's deepening frustration with stalled negotiations and its view of the Iranian regime's internal dynamics.