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.
Ulster Unionist Party
The Ulster Unionist Party traces its formal existence back to the foundation of the Ulster Unionist Council in 1905. Before that, however, there had been a less formally organised Irish Unionist Alliance (IUA) since the late 19th century, usually dominated by unionists from Ulster. Modern organised unionism properly emerged after William Ewart Gladstone's introduction in 1886 of the first of three Home Rule Bills in response to demands by the Irish Parliamentary Party. The IUA was an alliance of Irish Conservatives and Liberal Unionists, the latter having split from the Liberal Party over the issue of home rule. It was the merger of these two parties in 1912 that gave rise to the current name of the Conservative and Unionist Party, to which the UUP was formally linked (to varying degrees) until 1985.