Fifteen, and these were: * Andrew Jackson (1829-1837) * Martin Van Buren (1837-1841) * James K. Polk (1845-1849) * Franklin Pierce (1853-1857) * James Buchanan (1857-1861) * Andrew Johnson (1865-1869) * Grover Cleveland (1885-1889), (1893-1897) * Woodrow Wilson (1913-1921) * Franklin Delano Roosevelt (1933-1945) * Harry S. Truman (1945-1953) * John Fitzgerald Kennedy (1961-1963) * Lyndon Baines Johnson (1963-1969) * James Earl "Jimmy" Carter (1977-1981) * Bill Clinton (1993-2001) * Barack Obama (2009-)