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The Presidency
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Main navigation
The Presidency
U.S. Presidents
George Washington
John Adams
Thomas Jefferson
James Madison
James Monroe
John Quincy Adams
Andrew Jackson
Martin Van Buren
William Harrison
John Tyler
James K. Polk
Zachary Taylor
Millard Fillmore
Franklin Pierce
James Buchanan
Abraham Lincoln
Andrew Johnson
Ulysses S. Grant
Rutherford B. Hayes
James A. Garfield
Chester A. Arthur
Grover Cleveland
Benjamin Harrison
William McKinley
Theodore Roosevelt
William Taft
Woodrow Wilson
Warren G. Harding
Calvin Coolidge
Herbert Hoover
Franklin D. Roosevelt
Harry S. Truman
Dwight D. Eisenhower
John F. Kennedy
Lyndon B. Johnson
Richard Nixon
Gerald Ford
Jimmy Carter
Ronald Reagan
George H. W. Bush
Bill Clinton
George W. Bush
Barack Obama
Donald Trump
Joe Biden
Presidential Speeches
Presidential Oral Histories
Secret White House Tapes
Featured Content
Issues & Policy
U.S. Domestic Policy
Foreign Policy
Economics
Governance
Experts
Events
Upcoming Events
Past Events
Donate
Donate
Norman E. Borlaug
493–7
Richard M. Nixon
May 6, 1971
493–5
Richard M. Nixon
May 6, 1971
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