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".
Ali Khamenei
As Supreme Leader, Khamenei has influence over elections in Iran since the Constitution of Iran allows him to appoint half of the members of the Guardian Council and the Chief Justice of Iran. The Constitution also establishes that the Council approves or disqualifies candidates for office while the Chief Justice presents the other half of the members of the Council to be selected by Parliament. These constitutional provisions give Khamenei direct and indirect influence over the Council; an entity that, in turn, has direct influence over who can run for government. This influence was evident in the 2004 parliamentary elections, in which the Guardian Council disqualified thousands of candidates from running—including 80 incumbents, many of the reformist members of Parliament, and all the candidates of the Islamic Iran Participation Front party. Subsequently, the conservatives won about 70 percent of parliamentary seats. The election became a key turning point in the country's political evolution as it marked the end of the campaign for political and social reform initiated by former President Mohammad Khatami.