With the election of Hassan Rouhani, the Iranian people signaled their clear dissatisfaction with Iran's government and its policies. We hope such a surprising and convincing electoral outcome will persuade Supreme Leader Ayatollah Ali Khamenei to abandon Iran's nuclear weapons quest. But until we see a significant slowdown of Iran's nuclear activities, we believe our nation must toughen sanctions and reinforce the credibility of our option to use military force at the same time as we fully explore a diplomatic solution to our dispute with Iran.