Question: Robert L. DuPont, is a national leader in marijuana policy, drug policy and treatment, he was second White House Drug Czar from 1973 to 1977 under former Presidents Richard Nixon and which American politician who served as the 38th President of the United States from August 1974 to January 1977?
Context: Retired United States Army Lieutenant Colonel Gene T. Boyer (born July 24, 1929) was the chief pilot of Army One, the helicopter transporting the President of the United States, between 1964 and 1975.  Boyer was the pilot during President Richard Nixon's last day in office on August 9, 1974, when Nixon famously delivered the V sign just prior to leaving office.  He led the restoration of the VH-3A "Sea King" helicopter, tail number 150617, that served as Army One that day.  That helicopter is now on permanent display at the Richard Nixon Presidential Library and Museum.  Boyer also served Presidents Johnson and Ford as a White House pilot. Bobbie Kilberg (born Barbara Greene; October 25, 1944) is a Republican operative who has worked for Presidents Richard Nixon, Gerald Ford, George H.W. Bush, and George W. Bush.  Kilberg is currently the President and CEO of the Northern Virginia Technology Council and has been since 1998.  She was briefly an attorney with the Washington law firm of Arnold & Porter from 1971 to 1973.  Her White House experiences include serving on the staff of President Richard Nixon's Domestic Policy Council, serving under President Gerald Ford as Associate Counsel and serving for President George H.W. Bush as Deputy Assistant to the President for Public Liaison and as Director of the White House Office of Intergovernmental Affairs. The War on Drugs is an American term usually applied to the United States government's campaign of prohibition of drugs, military aid, and military intervention, with the stated aim being to reduce the illegal drug trade.  This initiative includes a set of drug policies that are intended to discourage the production, distribution, and consumption of psychoactive drugs that the participating governments and the UN have made illegal.  The term was popularized by the media shortly after a press conference given on June 18, 1971, by United States President Richard Nixon—the day after publication of a special message from President Nixon to the Congress on Drug Abuse Prevention and Control—during which he declared drug abuse "public enemy number one".  That message to the Congress included text about devoting more federal resources to the "prevention of new addicts, and the rehabilitation of those who are addicted", but that part did not receive the same public attention as the term "war on drugs".  However, two years prior to this, Nixon had formally declared a "war on drugs" that would be directed toward eradication, interdiction, and incarceration.  Today, the Drug Policy Alliance, which advocates for an end to the War on Drugs, estimates that the United States spends $51 billion annually on these initiatives. Drug Czar is an informal name for the person who directs drug-control policies in the United States, following the U.S. use of the 'czar' term.  The 'drug czar' title was first published in a 1982 news story by United Press International which reported that “Senators... voted 62–34 to establish a ‘drug czar’ who would have overall responsibility for U.S. drug policy.”  Since then, several "ad hoc" executive positions in both the United States and United Kingdom have been established which have been subsequently referred to in this manner. Gerald Rudolph Ford Jr. (born Leslie Lynch King Jr.; July 14, 1913 – December 26, 2006) was an American politician who served as the 38th President of the United States from August 1974 to January 1977, following the resignation of Richard Nixon.  Prior to this he served eight months as the 40th Vice President of the United States, following the resignation of Spiro Agnew.  He was the first person appointed to the vice presidency under the terms of the 25th Amendment, and consequently the only person to have served as both Vice President and President of the United States without being elected to executive office.  Before his appointment to the vice presidency, Ford served 25 years as U.S. Representative from Michigan's 5th congressional district, the final nine of them as the House Minority Leader. The presidency of Gerald Ford began on August 9, 1974, when Gerald Ford became President of the United States, and ended on January 20, 1977, a span of days.  Ford, the 38th United States president, succeeded Richard Nixon, who had resigned from office.  Prior to this he was the 40th Vice President of the United States, serving from 1973 until President Richard Nixon's resignation in 1974.  He was the first person appointed to the vice presidency under the terms of the Twenty-fifth Amendment to the United States Constitution, following the resignation of Vice President Spiro Agnew on October 10, 1973.  Ford has the distinction of being the first, and to date the only person to have served as both vice president and president without being elected to either office. John P. Walters (born February 8, 1952) is the former Director of the White House Office of National Drug Control Policy (ONDCP).  He held that position from December 7, 2001 to January 20, 2009.  As the nation's "Drug Czar," Walters coordinated all aspects of federal anti-drug policies and spending. Robert S. Warshaw is an American law enforcement official and former Associate Director of the White House Office of National Drug Control Policy, commonly referred to as the "deputy drug czar."  Warshaw, appointed to the position in 1998, served under ONDCP Director Barry McCaffrey.  He previously served as Chief of the Rochester Police Department.  Upon being appointed to the ONDCP, Warshaw was succeeded as police chief by Robert Duffy, later Mayor of Rochester and currently lieutenant governor of New York State. Robert L. DuPont (born March 25, 1936 in Toledo, Ohio) is a national leader in marijuana policy, drug policy and treatment.  He was the first Director of the National Institute on Drug Abuse (NIDA) from 1973 to 1978 and was the second White House Drug Czar from 1973 to 1977 under former Presidents Richard Nixon and Gerald Ford.  In 1978 Dr. DuPont became the founding President of the Institute for Behavior and Health, Inc.  In 1982 he and Peter B. Bensinger founded Bensinger, DuPont & Associates, a national consulting firm. Jerome H. Jaffe was the Drug Czar under the administration of President of the United States Richard Nixon.
Answer: Gerald Ford