Washington : Obama won a second term after defeating his Republican challenger Mitt Romney.
Here is a list of US presidents:
1.George Washington, 1789-1797
2.John Adams, 1797-1801
3.Thomas Jefferson, 1801-1809
4.James Madison, 1809-1817
5.James Monroe, 1817-1825
6.John Quincy Adams, 1825-1829
7.Andrew Jackson, 1829-1837
8.Martin Van Buren, 1837-1841
9.William Henry Harrison, 1841
10.John Tyler, 1841-1845
11.James Knox Polk, 1845-1849
12.Zachary Taylor, 1849-1850
13.Millard Fillmore, 1850-1853
14.Franklin Pierce, 1853-1857
15.James Buchanan, 1857-1861
16.Abraham Lincoln, 1861-1865
17.Andrew Johnson, 1865-1869
18.Ulysses S. Grant, 1869-1877
19.Rutherford Birchard Hayes, 1877-1881
20.James Abram Garfield, 1881
21.Chester Alan Arthur, 1881-1885
22.Grover Cleveland, 1885-1889
23.Benjamin Harrison, 1889-1893
24.Grover Cleveland, 1893-1897
25.William McKinley, 1897-1901
26.Theodore Roosevelt, 1901-1909
27.William Howard Taft, 1909-1913
28.Woodrow Wilson, 1913-1921
29.Warren Gamaliel Harding, 1921-1923
30.Calvin Coolidge, 1923-1929
31.Herbert Clark Hoover, 1929-1933
32.Franklin Delano Roosevelt, 1933-1945
33.Harry S. Truman, 1945-1953
34.Dwight David Eisenhower, 1953-1961
35.John Fitzgerald Kennedy, 1961-1963
36.Lyndon Baines Johnson, 1963-1969
37.Richard Milhous Nixon, 1969-1974
38.Gerald Rudolph Ford, 1974-1977
39.James Earl Carter, Jr., 1977-1981
40.Ronald Wilson Reagan, 1981-1989
41.George Herbert Walker Bush, 1989-1993
42.William Jefferson Clinton, 1993-2001
43.George Walker Bush, 2001-2009
44.Barack Hussein Obama, 2009-