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Barack Obama
2009-
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George W. Bush
2001–2009
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Dwight D. Eisenhower
1953–1961
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John F. Kennedy
1961–1963
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Lyndon B. Johnson
1963–1969
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Richard M. Nixon
1969–1974
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Gerald R. Ford
1974–1977
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Jimmy Carter
1977–1981
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Ronald Reagan
1981–1989
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George Bush
1989–1993
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William Jefferson Clinton
1993–2001
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