List of presidents
edit- Parties
No party Federalist Democratic-Republican Democratic Whig Republican
No. [n 1] |
Portrait | Name (Birth–Death) |
Term (Election) [n 1] |
Political party | Term of office | Vice President | Ref. | |
---|---|---|---|---|---|---|---|---|
1 | George Washington (1732–1799) |
1 (1789) |
None | April 30, 1789 | March 4, 1797 | John Adams April 30, 1789 – March 4, 1797 |
[1] | |
2 (1792) | ||||||||
Passage of the Bill of Rights; Whiskey Rebellion; Judiciary Act of 1789; Jay Treaty; Proclamation of Neutrality; chartering of the First Bank of the United States; Naval Act of 1794; Farewell Address and establishment of the two-term tradition. | ||||||||
2 | John Adams (1735–1826) |
3 (1796) |
Federalist | March 4, 1797 | March 4, 1801 | Thomas Jefferson March 4, 1797 – March 4, 1801 |
[2] | |
Quasi-War; the XYZ Affair; the Alien and Sedition Acts; first President to live in the White House; nominated the Midnight judges before leaving office. | ||||||||
3 | Thomas Jefferson (1743–1826) |
4 (1800) |
Democratic- Republican |
March 4, 1801 | March 4, 1809 | Aaron Burr March 4, 1801 – March 4, 1805 |
[3] | |
5 (1804) |
George Clinton[n 2] March 4, 1805 – April 20, 1812 | |||||||
First Barbary War; the Louisiana Purchase; establishment of the United States Military Academy; Lewis and Clark Expedition; Embargo Act of 1807. | ||||||||
4 | James Madison (1751–1836) |
6 (1808) |
Democratic- Republican |
March 4, 1809 | March 4, 1817 | [4][5] | ||
7 (1812) |
vacant[n 3] April 20, 1812 – March 4, 1813 | |||||||
Elbridge Gerry[n 2] March 4, 1813 – November 23, 1814 | ||||||||
vacant[n 3] November 23, 1814 – March 4, 1817 | ||||||||
Sued for peace with the Britain and France, but when he saw war as inevitable, he signed a declaration of war that began the War of 1812, where American forces were eventually routed; fled to Virginia during the Burning of Washington; a national bank, the Second Bank of the United States was chartered; the Tariff of 1816, the first protective tariff enacted by the U.S. Congress, is instituted. | ||||||||
5 | James Monroe (1758–1831) |
8 (1816) |
Democratic- Republican |
March 4, 1817 | March 4, 1825 | Daniel D. Tompkins March 4, 1817 – March 4, 1825 |
[6][5] | |
9 (1820) | ||||||||
Authorized the First Seminole War; oversaw the ceding of the Florida Territory to the United States; passage of the Missouri Compromise; pioneered the Monroe Doctrine. | ||||||||
6 | John Quincy Adams (1767–1848) |
10 (1824) |
Democratic- Republican; National Republican |
March 4, 1825 | March 4, 1829 | John C. Calhoun[n 4] March 4, 1825 – December 28, 1832 |
[7][5] | |
His numerous efforts regarding education, science and the economy were stymied by Jacksonians in Congress; ground-breaking of the Chesapeake and Ohio Canal; institution of the Tariff of Abominations. | ||||||||
7 | Andrew Jackson (1767–1845) |
11 (1828) |
Democratic | March 4, 1829 | March 4, 1837 | [8][5] | ||
vacant[n 3] December 28, 1832 – March 4, 1833 | ||||||||
12 (1832) |
Martin Van Buren March 4, 1833 – March 4, 1837 | |||||||
First President to use the spoils system in American politics; the Nullification Crisis; passage of the Indian Removal Act of 1830; the Bank War. | ||||||||
8 | Martin Van Buren (1782–1862) |
13 (1836) |
Democratic | March 4, 1837 | March 4, 1841 | Richard Mentor Johnson March 4, 1837 – March 4, 1841 |
[9][5] | |
The Panic of 1837; the Aroostook War; the Caroline affair; resisted the admission of Texas into the Union, as Texas practiced slavery. | ||||||||
9 | William Henry Harrison (1773–1841) |
14 (1840) |
Whig | March 4, 1841 | April 4, 1841 [n 2] |
John Tyler March 4, 1841 – April 4, 1841 |
[10] | |
Died exactly a month after assuming the office, of pneumonia. He was the first President to ever die in office. | ||||||||
10 [n 5] |
John Tyler (1790–1862) |
Whig April 4, 1841 – September 13, 1841 |
April 4, 1841 | March 4, 1845 | vacant[n 3] April 4, 1841 – March 4, 1845 |
[11][5] | ||
None[n 6] September 13, 1841 – March 4, 1845 | ||||||||
The Webster–Ashburton Treaty with Britain; the Treaty of Wanghia with China; reorganization of the United States Navy; enhancements to the United States Naval Observatory; the annexation of Texas. | ||||||||
11 | James K. Polk (1795–1849) |
15 (1844) |
Democratic | March 4, 1845 | March 4, 1849 | George M. Dallas March 4, 1845 – March 4, 1849 |
[12][5] | |
The Oregon Treaty; led the United States to victory in the Mexican American War; the Treaty of Guadalupe Hidalgo, which gave the United States most of its present-day Southwest; passage of the Walker Tariff; opening of the United States Naval Academy, and the Smithsonian Institution. | ||||||||
12 | Zachary Taylor (1784–1850) |
16 (1848) |
Whig | March 4, 1849 | July 9, 1850 [n 2] |
Millard Fillmore March 4, 1849 – July 9, 1850 |
[13] | |
The Clayton-Bulwer Treaty; resisted Southern threats to secede from the Union; died in office, of cholera. | ||||||||
13 | Millard Fillmore (1800–1874) |
Whig | July 9, 1850 | March 4, 1853 | vacant[n 3] July 9, 1850 – March 4, 1853 |
[14][5] | ||
Institution of the Compromise of 1850, which saw five separate bills enacted, and the threat of civil war delayed; passage of the Fugitive Slave Act of 1850; the Perry Expedition to Japan. | ||||||||
14 | Franklin Pierce (1804–1869) |
17 (1852) |
Democratic | March 4, 1853 | March 4, 1857 | William R. King[n 2] March 4, 1853 – April 18, 1853 |
[15] | |
vacant[n 3] April 18, 1853 – March 4, 1857 | ||||||||
VARIOUS EVENTS TK | ||||||||
15 | James Buchanan (1791–1868) |
18 (1856) |
Democratic | March 4, 1857 | March 4, 1861 | John C. Breckinridge March 4, 1857 – March 4, 1861 |
[16] | |
VARIOUS EVENTS TK | ||||||||
16 | Abraham Lincoln (1809–1865) |
19 (1860) |
Republican National Union[n 7] |
March 4, 1861 | April 15, 1865 [n 8] |
Hannibal Hamlin March 4, 1861 – March 4, 1865 |
[17] | |
20 (1864) |
Andrew Johnson March 4, 1865 – April 15, 1865 | |||||||
VARIOUS EVENTS TK | ||||||||
17 | Andrew Johnson (1808–1875) |
Democratic National Union;[n 7] None[n 9] |
April 15, 1865 | March 4, 1869 | vacant[n 3] April 15, 1865 – March 4, 1869 |
[18] | ||
VARIOUS EVENTS TK | ||||||||
18 | Ulysses S. Grant (1822–1885) |
21 (1868) |
Republican | March 4, 1869 | March 4, 1877 | Schuyler Colfax March 4, 1869 – March 4, 1873 |
[19] | |
22 (1872) |
Henry Wilson[n 2] March 4, 1873 – November 22, 1875 | |||||||
vacant[n 3] November 22, 1875 – March 4, 1877 | ||||||||
VARIOUS EVENTS TK | ||||||||
19 | Rutherford B. Hayes (1822–1893) |
23 (1876) |
Republican | March 4, 1877 | March 4, 1881 | William A. Wheeler March 4, 1877 – March 4, 1881 |
[20] | |
VARIOUS EVENTS TK | ||||||||
20 | James A. Garfield (1831–1881) |
24 (1880) |
Republican | March 4, 1881 | September 19, 1881 [n 8] |
Chester A. Arthur March 4, 1881 – September 19, 1881 |
[21] | |
VARIOUS EVENTS TK | ||||||||
21 | Chester A. Arthur (1829–1886) |
Republican | September 19, 1881 | March 4, 1885 | vacant[n 3] September 19, 1881 – March 4, 1881 |
[22] | ||
VARIOUS EVENTS TK | ||||||||
22 | Grover Cleveland (1837–1908) |
25 (1884) |
Democratic | March 4, 1885 | March 4, 1889 | Thomas A. Hendricks[n 2] March 4, 1885 – November 25, 1885 |
[23] | |
vacant[n 3] November 25, 1885 – March 4, 1889 | ||||||||
VARIOUS EVENTS TK | ||||||||
23 | Benjamin Harrison (1833–1901) |
26 (1888) |
Republican | March 4, 1889 | March 4, 1893 | Levi P. Morton March 4, 1889 – March 4, 1893 |
[24] | |
VARIOUS EVENTS TK | ||||||||
24 | Grover Cleveland (1837–1908) |
27 (1892) |
Democratic | March 4, 1893 | March 4, 1897 | Adlai E. Stevenson I March 4, 1893 – March 4, 1897 |
[25] | |
VARIOUS EVENTS TK | ||||||||
25 | William McKinley (1843–1901) |
28 (1896) |
Republican | March 4, 1897 | September 14, 1901 [n 8] |
Garret Hobart[n 2] March 4, 1897 – November 21, 1899 |
[26] | |
vacant[n 3] November 21, 1899 – March 4, 1901 | ||||||||
29 (1900) |
Theodore Roosevelt March 4, 1901 – September 14, 1901 | |||||||
VARIOUS EVENTS TK | ||||||||
26 | Theodore Roosevelt (1858–1919) |
Republican | September 14, 1901 | March 4, 1909 | vacant[n 3] September 14, 1901 – March 4, 1905 |
[27] | ||
30 (1904) |
Charles W. Fairbanks March 4, 1905 – March 4, 1909 | |||||||
VARIOUS EVENTS TK | ||||||||
27 | William Howard Taft (1857–1930) |
31 (1908) |
Republican | March 4, 1909 | March 4, 1913 | James S. Sherman[n 2] March 4, 1909 – October 30, 1912 |
[28] | |
vacant[n 3] October 30, 1912 – March 4, 1913 | ||||||||
VARIOUS EVENTS TK | ||||||||
28 | Woodrow Wilson (1856–1924) |
32 (1912) |
Democratic | March 4, 1913 | March 4, 1921 | Thomas R. Marshall March 4, 1913 – March 4, 1921 |
[29] | |
33 (1916) | ||||||||
VARIOUS EVENTS TK | ||||||||
29 | Warren G. Harding (1865–1923) |
34 (1920) |
Republican | March 4, 1921 | August 2, 1923 [n 2] |
Calvin Coolidge March 4, 1905 – August 2, 1923 |
[30] | |
VARIOUS EVENTS TK | ||||||||
30 | Calvin Coolidge (1872–1933) |
Republican | August 2, 1923 | March 4, 1929 | vacant[n 3] August 2, 1923 – March 4, 1929 |
[31] | ||
35 (1924) |
Charles G. Dawes March 4, 1925 – March 4, 1929 | |||||||
VARIOUS EVENTS TK | ||||||||
31 | Herbert Hoover (1874–1964) |
36 (1928) |
Republican | March 4, 1929 | March 4, 1933 | Charles Curtis March 4, 1929 – March 4, 1933 |
[32] | |
VARIOUS EVENTS TK | ||||||||
32 | Franklin D. Roosevelt (1882–1945) |
37 (1932) [n 10] |
Democratic | March 4, 1933 | April 12, 1945 [n 2] |
John Nance Garner March 4, 1933 – January 20, 1941 |
[33] | |
38 (1936) |
VARIOUS EVENTS TK | |||||||
39 (1940) |
Henry A. Wallace January 20, 1941 – January 20, 1945 | |||||||
40 (1944) |
Harry S. Truman January 20, 1945 – April 12, 1945 | |||||||
33 | Harry S. Truman (1884–1972) |
Democratic | April 12, 1945 | January 20, 1953 | vacant[n 3] April 12, 1945 – January 20, 1949 |
[34] | ||
41 (1948) |
Alben W. Barkley January 20, 1949 – January 20, 1953 | |||||||
VARIOUS EVENTS TK | ||||||||
34 | Dwight D. Eisenhower (1890–1969) |
42 (1952) |
Republican | January 20, 1953 | January 20, 1961 [n 11] |
Richard Nixon January 20, 1953 – January 20, 1961 |
[35] | |
43 (1956) | ||||||||
VARIOUS EVENTS TK | ||||||||
35 | John F. Kennedy (1917–1963) |
44 (1960) |
Democratic | January 20, 1961 | November 22, 1963 [n 8] |
Lyndon B. Johnson January 20, 1961 – November 22, 1963 |
[36] | |
VARIOUS EVENTS TK | ||||||||
36 | Lyndon B. Johnson (1908–1973) |
Democratic | November 22, 1963 | January 20, 1969 | vacant[n 3] November 22, 1963 – January 20, 1965 |
[37] | ||
45 (1964) |
Hubert Humphrey January 20, 1965 – January 20, 1969 | |||||||
VARIOUS EVENTS TK | ||||||||
37 | Richard Nixon (1913–1994) |
46 (1968) |
Republican | January 20, 1969 | August 9, 1974 [n 4] |
Spiro Agnew | [38] | |
47 (1972) | ||||||||
VARIOUS EVENTS TK | vacant[n 3] October 10, 1973 – December 6, 1973 | |||||||
Gerald Ford December 6, 1973 – August 9, 1974 | ||||||||
38 | Gerald Ford (1913–2006) |
Republican | August 9, 1974 | January 20, 1977 | vacant[n 3] August 9, 1974 – December 19, 1974 |
[39] | ||
Nelson Rockefeller December 19, 1974 – January 20, 1977 | ||||||||
VARIOUS EVENTS TK | ||||||||
39 | Jimmy Carter (1924– ) |
48 (1976) |
Democratic | January 20, 1977 | January 20, 1981 | Walter Mondale January 20, 1977 – January 20, 1981 |
[40] | |
VARIOUS EVENTS TK | ||||||||
40 | Ronald Reagan (1911–2004) |
49 (1980) |
Republican | January 20, 1981 | January 20, 1989 | George H. W. Bush January 20, 1981– January 20, 1989 |
[41] | |
50 (1984) | ||||||||
VARIOUS EVENTS TK | ||||||||
41 | George H. W. Bush (1924– ) |
51 (1988) |
Republican | January 20, 1989 | January 20, 1993 | Dan Quayle January 20, 1989 – January 20, 1993 |
[42] | |
VARIOUS EVENTS TK | ||||||||
42 | Bill Clinton (1946– ) |
52 (1992) |
Democratic | January 20, 1993 | January 20, 2001 | Al Gore January 20, 1993 – January 20, 2001 |
[43] | |
53 (1996) | ||||||||
VARIOUS EVENTS TK | ||||||||
43 | George W. Bush (1946– ) |
54 (2000) |
Republican | January 20, 2001 | January 20, 2009 | Dick Cheney January 20, 2001 – January 20, 2009 |
[44] | |
55 (2004) | ||||||||
VARIOUS EVENTS TK | ||||||||
44 | Barack Obama (1961– ) |
56 (2008) |
Democratic | January 20, 2009 | Incumbent | Joe Biden January 20, 2009 – Incumbent |
[45] | |
57 (2012) | ||||||||
VARIOUS EVENTS TK |
Notes
edit- ^ a b A presidency is defined as consecutive time in office served by a single person. For example, George Washington served two consecutive terms and is counted as the first president (not the first and second). Gerald Ford assumed the presidency after the resignation of Richard Nixon, serving out the remainder of what would have been Nixon's second term. The fact that Ford was not voted into office does not affect the numbering, which makes him the 38th president. In addition, under this numbering, Grover Cleveland is counted as having two separate presidencies, having served two non-consecutive terms.
- ^ a b c d e f g h i j k Died in office of natural causes.
- ^ a b c d e f g h i j k l m n o p q r Before the ratification of the Twenty-fifth Amendment to the United States Constitution in 1967, there was no provision for filling a vacancy in the Vice Presidency. Richard Nixon was the first president to fill such a vacancy under the provisions of the Twenty-fifth Amendment when he appointed Gerald Ford. Ford later became the second president to fill a vice presidential vacancy when he appointed Nelson Rockefeller to succeed him.
- ^ a b Resigned.
- ^ The first vice president to assume the presidency, Tyler set a precedent that a vice president who assumes the office of president becomes a fully functioning president who has his own presidency, as opposed to just a caretaker president. His political opponents attempted to refer to him as "Acting President", but he refused to allow that. The Twenty-fifth Amendment to the United States Constitution put Tyler's precedent into the Constitution.
- ^ Former Democrat who ran for Vice President on Whig ticket. Clashed with Whig congressional leaders and was expelled from the Whig party in 1841.
- ^ a b Abraham Lincoln and Andrew Johnson were, respectively, a Republican and a Democrat who ran on the National Union ticket in 1864.
- ^ a b c d Assassinated.
- ^ Andrew Johnson did not identify with the two main parties while president and tried to build a party of loyalists under the National Union label. His failure to do so left him without a party.
- ^ This term was shortened by 43 days by the Twentieth Amendment to the United States Constitution, which moved inauguration day from March 4 to January 20.
- ^ Dwight Eisenhower is the first president to have been legally prohibited by the Twenty-second Amendment to the United States Constitution from seeking a third term.
References
edit- ^ Michael Beschloss and Hugh Sidey (2009). "George Washington". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "John Adams". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Thomas Jefferson". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "James Madison". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ a b c d e f g h The American Presidency. Encyclopaedia Britannica. 2013. ISBN 1625130406. Retrieved 29 June 2015.
- ^ Michael Beschloss and Hugh Sidey (2009). "James Monroe". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "John Quincy Adams". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Andrew Jackson". The Presidents of the United States of America. White House Historical Association. Retrieved 29 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Martin Van Buren". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "William Henry Harrison". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "John Tyler". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "James K. Polk". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Zachary Taylor". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Millard Fillmore". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Franklin Pierce". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "James Buchanan". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Abraham Lincoln". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Andrew Johnson". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Ulysses S. Grant". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Rutherford B. Hayes". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "James Garfield". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Chester A. Arthur". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Grover Cleveland". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Benjamin Harrison". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Grover Cleveland". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "William McKinley". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Theodore Roosevelt". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "William Howard Taft". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Woodrow Wilson". The Presidents of the United States of America. White House Historical Association. Retrieved 31 March 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Warren G. Harding". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Calvin Coolidge". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Herbert Hoover". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Franklin D. Roosevelt". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Harry S. Truman". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Dwight D. Eisenhower". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "John F. Kennedy". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Lyndon B. Johnson". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Richard M. Nixon". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Gerald R. Ford". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "James Carter". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Ronald Reagan". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "George H. W. Bush". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "William J. Clinton". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "George W. Bush". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.
- ^ Michael Beschloss and Hugh Sidey (2009). "Barack Obama". The Presidents of the United States of America. White House Historical Association. Retrieved 1 April 2012.