Worried about Britain's other interests in Iran, and (thanks to the Tudeh party) believing that Iran's nationalism was really a Soviet-backed plot, Britain persuaded US Secretary of State John Foster Dulles that Iran was falling to the Soviets—effectively exploiting the American Cold War mindset. Since President Harry S. Truman was busy fighting a war in Korea, he did not agree to overthrow the government of Prime Minister Mohammad Mosaddegh. However, in 1953, when Dwight D. Eisenhower became president, the UK convinced the U.S. to undertake a joint coup d'état.