A United States presidential doctrine comprises the key goals, attitudes, or stances for United States foreign affairs outlined by a president.[1] Most presidential doctrines are related to the Cold War. Though many U.S. presidents had themes related to their handling of foreign policy, the term doctrine generally applies to presidents such as James Monroe, Harry S. Truman, Richard Nixon, Jimmy Carter and Ronald Reagan, all of whom had doctrines which more completely characterized their foreign policy.