Progressive Party (United States, 1912)
The Progressive Party was a third party in the United States formed in 1912 by former President Theodore Roosevelt after he lost the presidential nomination of the Republican Party to his former protégé, incumbent President William Howard Taft. The new party was known for taking advanced positions on progressive reforms and attracting some leading reformers. After the party's defeat in the 1912 presidential election, it went into rapid decline, disappearing by 1918. The Progressive Party was popularly nicknamed the "Bull Moose Party" since Roosevelt often said that he felt "strong as a bull moose" both before and after an assassination attempt on the campaign trail.
Populism
The People's Party of the late 19th century United States is considered to be "one of the defining populist movements"; its members were often referred to as the "Populists" at the time. Its radical platform included calling for the nationalisation of railways, the banning of strikebreakers, and the introduction of referenda. The party gained representation in several state legislatures during the 1890s, but was not powerful enough to mount a successful presidential challenge. In the 1896 presidential election, the People's Party supported the Democratic Party candidate William Jennings Bryan; after his defeat, the People's Party's support declined.
Other early populist political parties in the United States included the Greenback Party, the Progressive Party of 1912 led by Theodore Roosevelt, the Progressive Party of 1924 led by Robert M. La Follette, Sr., and the Share Our Wealth movement of Huey Long in 1933–1935.
In Canada, populist groups adhering to a social credit ideology had various successes at local and regional elections from the 1930s to the 1960s, although the main Social Credit Party of Canada never became a dominant national force.