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.
Fianna Fáil other members split from Sinn Féin when a motion he proposed—which called for elected members to be allowed to take their seats in Dáil Éireann if and when the controversial Oath of Allegiance was removed—failed to pass at the Sinn Féin Ard Fheis in 1926. The party adopted its name on 2 April of the same year. While Fianna Fáil was also opposed to the Treaty settlement, it rejected abstentionism, instead aiming to republicanise the Irish Free State from within. The party's platform of economic autarky had appeal among the farmers, working-class people and the poor while alienating more affluent