During his first term, Trump withdrew from the 2015 nuclear deal with Iran, known as the Joint Comprehensive Plan of Action (JCPOA), under which Iran agreed to restrict its nuclear activities and permit international inspections, in exchange for the removal of severe economic sanctions.

A letter U.S. President Donald Trump wrote to Iran’s supreme leader in an attempt to jump-start talks over Tehran’s rapidly advancing nuclear program has arrived in the Iranian capital.

Supreme Leader Ayatollah Ali Khamenei said Iran will not be bullied into negotiations, a day after President Donald Trump said he sent a letter urging Tehran to negotiate.