Republican Party (United States)
Founded in 1854, the GOP originally subscribed to classical liberalism and took ideological stands that were anti-slavery and pro-economic reform. Abraham Lincoln was the first Republican president in the history of the United States. The party was usually dominant over the Democrats during the Third Party System and Fourth Party System. In 1912, Theodore Roosevelt formed the Progressive ("Bull Moose") Party after being rejected by the GOP and ran as a third-party presidential candidate. Roosevelt called for many social reforms, some of which were later championed by New Deal Democrats in the 1930s. He lost the 1912 election, and when most of his supporters returned to the GOP, they were at odds with the party's new conservative economic stance; many left for the Democratic Party, and an ideological shift to the right occurred in the Republican Party. Later in the 20th century, the liberal Republican element was overwhelmed by a conservative surge begun by Barry Goldwater in 1964 and continued during the Reagan Era.
1912 Progressive National Convention
Angered at the renomination of President William Howard Taft over their candidate at the 1912 Republican National Convention, supporters of former president Theodore Roosevelt convened in Chicago and endorsed the formation of a national progressive party. When formally launched later that summer, the new Progressive Party acclaimed Roosevelt as its presidential nominee and Governor Hiram Johnson of California as his running mate. Questioned by reporters, Roosevelt said he felt as strong as a "bull moose". Henceforth known as the " Bull Moose Party", the Progressives promised to increase federal regulation and protect the welfare of ordinary people.