President Barack Obama meets in the Oval Office with Chief of Staff Denis McDonough, and Deputy National Security Advisors Tony Blinken and Ben Rhodes, to discuss ongoing negotiations with Iran, Saturday, Nov. 23, 2013.
(Official White House Photo by Pete Souza)
** FILE ** This Nov. 23, 2103, file photo shows President Barack Obama speaking in the State Dining Room at the White House about the nuclear deal between six world powers and Iran that calls on Tehran to limit its nuclear activities in return for sanctions relief. (AP Photo/Susan Walsh, File)
In this photo released by the Iranian Students News Agency, ISNA, Iranians hold posters of President Hassan Rouhani as they welcome Iranian nuclear negotiators upon their arrival from Geneva at the Mehrabad airport in Tehran, Iran, Sunday, Nov. 24, 2013. Hundreds of cheering supporters greeted Iran's nuclear negotiators as they arrived back to Tehran late Sunday night. Tehran agreed Sunday to a six-month pause of its nuclear program while diplomats continue talks. International observers are set to monitor Iran's nuclear sites as the West eases about $7 billion of the economic sanctions crippling the Islamic Republic. (AP Photo/ISNA,Hemmat Khahi)
National Edition News Cover for November 25, 2013 - Iran nuclear deal faces uphill battle - U.S. Secretary of State John Kerry, right, and Iranian Foreign Minister Mohammad Javad Zarif, shake hands at the United Nations Palais, Sunday, Nov. 24, 2013, in Geneva, Switzerland. Iran struck a historic nuclear deal Sunday with the United States and five other world powers, in the most significant development between Washington and Tehran in more than three decades of estrangement between the two nations. The agreement commits Iran to curb its nuclear activities in exchange for limited and gradual sanctions relief. (AP Photo/Carolyn Kaster, Pool)