America is a firmly entrenched two-party system. Arguably, the closest it has become in the post Civil-War period to becoming a Three-Party system was with the rise of the Populist Party (officially the ‘People’s Party) between 1892 and 1896. The Party had 9 elected Governors, 6 Senators and multiple Congressmen. However, its party was subsumed by the Democrats and their success was short-lived.
However, Third-Party and Independent candidates can still have a major influence in the US political system
So, who are the most significant Third-Party and Independent candidates of the twentieth century?