Question: During his tenure as Ambassador to Vietnam, Donal Read Heath advocated and carried out American policy under a United States Secretary of State for what president?   

Context articles: John Foster Dulles
Jacob Dolson Cox
Donald R. Heath
NSC-68
Patricia Roberts Harris
Clifford Sobel
James A. Baker III Institute for Public Policy
A. Wess Mitchell
Shirin R. Tahir-Kheli
Robert Lansing

John Foster Dulles ( ; February 25, 1888May 24, 1959) served as United States Secretary of State under Republican President Dwight D. Eisenhower from 1953 to 1959.
 He was a significant figure in the early Cold War era, advocating an aggressive stance against Communism throughout the world.
Jacob Dolson Cox, (Jr.) (October 27, 1828August 4, 1900) was a statesman, lawyer, Union Army general during the American Civil War, and later a Republican politician from Ohio.
 He served as the 28th Governor of Ohio and as United States Secretary of the Interior.
 As Governor of Ohio, Cox sided for a time with President Andrew Johnson's Reconstruction plan and was against African American suffrage in the South, though he supported it in Ohio.
 Seeing himself caught between Johnson and the Radical Republicans, Cox decided not to run for reelection.
 He stayed out of politics for a year, though both Sherman and Grant advocated that Cox replace Stanton as Secretary of War as a means of stemming the demands for Johnson's impeachment.
 But Johnson declined.
 When Ulysses S. Grant became President he nominated Cox Secretary of Interior and Cox immediately accepted.
 Secretary of Interior Cox implemented the first civil service reform in a federal government department, including examinations for most clerks.
 Grant initially supported Cox and civil service reform, creating America's first Civil Service Commission.
 However, Cox was opposed by Republican Party managers, who ultimately convinced Grant to cease civil service reforms.
 President Grant and Secretary Cox were at odds over the fraudulent McGarahan Claims and the Dominican Republic annexation treaty.
 Secretary Cox advocated a lasting, honest, and comprehensive Indian policy legislated by Congress after the Piegan Indian massacre.
 Cox resigned as Secretary of Interior having been unable to gain Grant's support over civil service reform.
 Although Cox was a reformer, Grant had believed Cox had overstepped his authority as Secretary of Interior and had undermined his authority as President.
 In 1872 Cox joined the Liberal Republicans in opposition to Grant's renomination.
 In 1876 Cox returned to politics and was elected to and served one term as United States Congressman of Ohio.
 Congressman Cox supported President Hayes's reform efforts, but his term as Congressman was unsuccessful at establishing permanent Civil Service reform.
 Cox retired and did not return to active politics, using his time to write several books on Civil War campaigns which remain today respected histories and memoirs.
Donald Read Heath (August 12, 1894 – October 15, 1981) was a member of the United States Foreign Service for more than four decades including service as the Ambassador to Cambodia (1950–1954), Laos (1950–1954), Vietnam (1952–1955), Lebanon (1955–1957) and Saudi Arabia (1958–1961).
 During his tenure as Ambassador to Vietnam, Heath advocated and carried out American policy under Secretary of State John Foster Dulles that helped set the stage for American military involvement.
National Security Council Report 68 (NSC-68) was a 58-page top secret policy paper by the United States National Security Council presented to President Harry S. Truman on April 14, 1950.
 It was one of the most important statements of American policy that launched the Cold War.
 In the words of scholar Ernest R. May, NSC-68 "provided the blueprint for the militarization of the Cold War from 1950 to the collapse of the Soviet Union at the beginning of the 1990s."
 NSC-68 and its subsequent amplifications advocated a large expansion in the military budget of the United States, the development of a hydrogen bomb, and increased military aid to allies of the United States.
 It made the containment of global Communist expansion a high priority.
 NSC-68 rejected the alternative policies of friendly détente and rollback against the Soviet Union.
Patricia Roberts Harris (May 31, 1924March 23, 1985) served in the American administration of President Jimmy Carter as United States Secretary of Housing and Urban Development, and United States Secretary of Health, Education, and Welfare (which was renamed the Secretary of Health and Human Services during her tenure).
 She was the first African American woman to serve in the United States Cabinet, and the first to enter the line of succession to the Presidency.
 She previously served as United States Ambassador to Luxembourg under President Lyndon B. Johnson, and was the first African-American woman to represent the United States as an ambassador.
Clifford Michael Sobel (born 1949, Brooklyn, New York) is an American business executive, financier, Republican fundraiser, U.S. diplomat and former ambassador.
 Most recently, he served as the United States Ambassador to Brazil.
 He was nominated for the post by President George W. Bush on May 23, 2006, confirmed by the United States Senate on June 29, 2006, and sworn in by Secretary of State Condoleezza Rice on July 20, 2006.
 He presented his credentials to the Brazilian Foreign Ministry on August 2, 2006.
 Ambassador Sobel is the 53rd Chief of Mission to Brazil.
 He resigned as ambassador in August 2009.
 From 2001-05, Sobel was the 62nd United States Ambassador to the Netherlands.
 President George W. Bush nominated him on July 3, 2001 and he was sworn in by Secretary of State Colin Powell on November 8, 2001.
 On December 5, 2001, he presented his credentials to Her Majesty Queen Beatrix.
The James A. Baker III Institute for Public Policy, also known as the Baker Institute, is an American think tank on the campus of Rice University in Houston, Texas.
 Founded in 1993, it functions as a nonpartisan center for public policy research.
 According to the "2015 Global Go To Think Tank Index Report" (Think Tanks and Civil Societies Program, University of Pennsylvania), the institute is No. 18 (of 60) in the "Top Think Tanks in the United States" and No. 4 (of 45) of the "Best University Affiliated Thanks".
 Its Center for Energy Studies is ranked No. 2 (of 55) among the world’s energy- and resource-policy think tanks, according to the Think Tanks and Civil Societies Program’s 2015 Index Report.
 It is named for James A. Baker, III, former United States secretary of state and secretary of the Treasury.
 The institute's director Edward P. Djerejian is the former United States ambassador to Israel and Syria and assistant secretary of state for Near Eastern Affairs.
 The institute's board of advisors include William Barnett (Chair), Colin Powell, Madeleine Albright and Rice University's President David Leebron.
A. Wess Mitchell is an American policy analyst and government official who is the Assistant Secretary of State for European and Eurasian Affairs.
 Prior to assuming his current position, he was president and CEO of the Center for European Policy Analysis.
 On July 19, 2017, President Donald Trump nominated Mitchell as Assistant Secretary of State for European and Eurasian Affairs.
 He was confirmed by the United States Senate in September 2017.
Shirin R. Tahir-Kheli is an American political scientist who also served in the Department of State.
 In 2006, she was appointed as the first Ambassador for women's empowerment by the United States Secretary of State Condoleezza Rice as well as Senior Advisor to the Secretary of State on United Nations Reform.
 She sworn in as the First American Muslim Ambassador in July 1990.
 Dr. Tahir-Kheli was the Special Assistant to the President and Senior Director for Democracy, Human Rights and International Operations at the White House National Security Council, from 2003-2005.
 She has served three Republican presidential administrations since 1980.
Robert Lansing ( ; October 17, 1864 – October 30, 1928) was an American lawyer and Conservative Democratic politician who served as Legal Advisor to the State Department at the outbreak of World War I, and then as United States Secretary of State under President Woodrow Wilson from 1915 to 1920.
 Before U.S. involvement in the war, Lansing vigorously advocated in favor of the principles of freedom of the seas and the rights of neutral nations.
 He later advocated U.S. participation in World War I, negotiated the Lansing–Ishii Agreement with Japan in 1917 and was a member of the American Commission to Negotiate Peace at Paris in 1919.