Sinn Féin for nine years. (It merged with two other organisations to form Fine Gael in 1933.) Anti-Treaty Sinn Féin members continued to boycott the Dáil. At a special "Ard Fheis" in March 1926, de Valera proposed that elected members be allowed to take their seats in the Dáil if and when the controversial Oath of Allegiance was removed. When his motion was defeated, de Valera resigned from Sinn Féin; on 16 May 1926, he founded his own party, Fianna Fáil, which was dedicated to republicanising the Free State from within its political structures. He took most Sinn Féin TDs with him.
Sinn Féin Féin. As the "Officials" dropped all mention of Sinn Féin from their name in 1982, instead calling itself the Workers' Party of Ireland, the Provisionals were now generally known as Sinn Féin. Supporters of Republican Sinn Féin, which came from a 1986 split, still use the term "Provisional Sinn Féin" to refer to the party led by Mary Lou McDonald. Sinn Féin members have also been referred to as Shinners, a term intended as a pejorative. Sinn Féin was founded on 28 November 1905, when, at the first annual Convention of the National Council, Arthur Griffith outlined the Sinn Féin