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".
Iran–United States relations
On 13 August 2018, Iranian Supreme leader Ayatollah Ali Khamenei banned direct talks with U.S., referring to the failure of the previous ones. "There will be no war, nor will we negotiate with the US" and "Even if we ever - impossible as it is - negotiated with the US, it would never ever be with the current US administration," Khamenei said in his speech. He added that the United States never budges on the primary goal they pursue in negotiations, which are normally based on give and take, and "reneges on its own end of the bargain" after the negotiation.
In the Fall of 2018, all the sanctions removed in 2015 were re-imposed on the Iranian regime by the Trump administration.WP