 In November 2018, the United States officially reinstated all sanctions against Iran that were previously lifted before the U.S. withdrew from the JCPOA.In April 2019 the U.S. threatened to sanction countries continuing to buy oil from Iran after an initial six-month waiver announced in November expired.In June 2019, Trump imposed the sanctions on Iranian Supreme Leader Ayatollah Ali Khamenei, his office and those closely affiliated with his access to key financial resources.