Nuclear program of Iran
U.S. President Obama reportedly sent a letter dated 20 April 2010 to President Lula of Brazil, in which he outlined a proposal of fuel swap. While expressing skepticism that the Iranians would now be willing to accept such a deal, having provided "no credible explanation" for the previous deal's rejection, President Obama wrote "For us, Iran’s agreement to transfer 1,200 kg of Iran’s low enriched uranium (LEU) out of the country would build confidence and reduce regional tensions by substantially reducing Iran’s LEU stockpile." Turkish Prime Minister Recep Tayyip Erdogan received a similar letter. A senior U.S. official told the "Washington Post" that the letter was a response to Iran's desire to ship out its uranium piecemeal, rather than in a single batch, and that during "multiple conversations" U.S. officials made clear that Iran should also cease 20% enrichment; however, the official stated "there was no president-to-president letter laying out those broader concerns".
Government of the Islamic Republic of Iran
In the Islamic Republic of Iran, President is the second person of government and the head of government. The President is the highest popularly elected official in Iran, although the President answers to the Supreme Leader of Iran, who functions as the country's head of state. Chapter 9 (Articles 133-142) of the Constitution of the Islamic Republic of Iran sets forth the qualifications for presidential candidates and procedures for election, as well as the President's powers and responsibilities as "functions of the executive". These include signing treaties and other agreements with foreign countries and international organizations; administering national planning, budget, and state employment affairs; and appointing ministers subject to the approval of Parliament.