"When I became secretary of state, Iran was weeks away from having enough nuclear material to form a bomb. They had mastered the nuclear fuel cycle under the Bush administration. They had built covert facilities. They had stocked them with centrifuges that were whirling away. And we had sanctioned them. I voted for every sanction against Iran when I was in the Senate, but it wasn't enough. So I spent a year-and-a-half putting together a coalition that included Russia and China to impose the toughest sanctions on Iran."