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?   

<P0-S0> 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). <P0-S1>  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. <P0-S2>  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. <SEP> <P1-S0>  He was a significant figure in the early Cold War era, advocating an aggressive stance against Communism throughout the world. <P1-S1> 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. <SEP> <P2-S0>  Grant initially supported Cox and civil service reform, creating America's first Civil Service Commission. <P2-S1>  Congressman Cox supported President Hayes's reform efforts, but his term as Congressman was unsuccessful at establishing permanent Civil Service reform. <P2-S2>  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. <P2-S3>  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. <P2-S4>  However, Cox was opposed by Republican Party managers, who ultimately convinced Grant to cease civil service reforms. <P2-S5>  Seeing himself caught between Johnson and the Radical Republicans, Cox decided not to run for reelection. <P2-S6>  When Ulysses S. Grant became President he nominated Cox Secretary of Interior and Cox immediately accepted. <P2-S7> 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. <P2-S8>  Cox resigned as Secretary of Interior having been unable to gain Grant's support over civil service reform. <P2-S9>  In 1876 Cox returned to politics and was elected to and served one term as United States Congressman of Ohio. <P2-S10>  President Grant and Secretary Cox were at odds over the fraudulent McGarahan Claims and the Dominican Republic annexation treaty. <P2-S11>  But Johnson declined. <P2-S12>  Although Cox was a reformer, Grant had believed Cox had overstepped his authority as Secretary of Interior and had undermined his authority as President. <P2-S13>  Secretary Cox advocated a lasting, honest, and comprehensive Indian policy legislated by Congress after the Piegan Indian massacre. <P2-S14>  He served as the 28th Governor of Ohio and as United States Secretary of the Interior. <SEP> <P3-S0>  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. <P3-S1> 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).