How would you have voted in past presidential elections without third parties?

[Unconditional Surrender Truman]

All without hindsight. Bold are elections where I would otherwise have voted for a third party.

1789   George Washington (Unaffiliated)
1792   George Washington (Unaffiliated)
1796   Thomas Jefferson (Republican)
1800   Thomas Jefferson (Republican)
1804   Thomas Jefferson (Republican)
1808   James Madison (Republican)
1812   DeWitt Clinton (Fusion)
1816   James Monroe (Republican)
1820   James Monroe (Republican)
1824   John Quincy Adams (Republican)
1828   John Quincy Adams (National Republican)
1832   Henry Clay (National Republican)
1836   Martin Van Buren (Democratic)
1840   Martin Van Buren (Democratic)
1844   Henry Clay (Whig)
1848   Zachary Taylor (Whig)
1852   Winfield Scott (Whig)
1856   John Charles Frémont (Republican)
1860   Abraham Lincoln (Republican)
1864   Abraham Lincoln (National Union)
1868   Ulysses S. Grant (Republican)
1872   Ulysses S. Grant (Republican)
1876   Rutherford Birchard Hayes (Republican)
1880   James Abram Garfield (Republican)
1884   Stephen Grover Cleveland (Democratic)
1888   Benjamin Harrison (Republican)
1892   Benjamin Harrison (Republican)
1896   William Jennings Bryan (Democratic)
1900   William Jennings Bryan (Democratic)
1904   Theodore Roosevelt (Republican)
1908   William Jennings Bryan (Democratic)
1912   Thomas Woodrow Wilson (Democratic)
1916   Thomas Woodrow Wilson (Democratic)
1920   James Middleton Cox (Democratic)
1924   John Calvin Coolidge (Republican)
1928   Alfred Emmanuel Smith (Democratic)
1932   Franklin Delano Roosevelt (Democratic)
1936   Franklin Delano Roosevelt (Democratic)
1940   Franklin Delano Roosevelt (Democratic)
1944   Franklin Delano Roosevelt (Democratic)
1948   Harry S. Truman (Democratic)
1952   Adlai Ewing Stevenson II (Democratic)
1956   Adlai Ewing Stevenson II (Democratic)
1960   John Fitzgerald Kennedy (Democratic)
1964   Lyndon Baines Johnson (Democratic)
1968   Hubert Horatio Humphrey (Democratic)
1972   George Sidney McGovern (Democratic)
1976   James Earl Carter (Democratic)
1980   James Earl Carter (Democratic)
1984   Walter Frederick Mondale (Democratic)
1988   Michael Stanley Dukakis (Democratic)
1992   William Jefferson Clinton (Democratic)
1996   William Jefferson Clinton (Democratic)
2000   Albert Arnold Gore, Jr. (Democratic)
2004   John Forbes Kerry (Democratic)
2008   Barack Hussein Obama II (Democratic)
2012   Barack Hussein Obama II (Democratic)
2016   Hillary Dianne Rodham Clinton (Democratic)
2020   Joseph Robinette Biden, Jr. (Democratic)