AS THE Obama administration pushes to complete a nuclear accord with Iran, numerous members of Congress, former secretaries of state and officials of allied governments are expressing concern about the contours of the emerging deal. Though we have long supported negotiations with Iran as well as the interim agreement the United States and its allies struck with Tehran, we share several of those concerns and believe they deserve more debate now — before negotiators present the world with a fait accompli. The problems raised by authorities ranging from Henry Kissinger, the country’s most senior former secretary of state, to Sen. Timothy M. Kaine, Virginia’s junior Democratic senator, […]