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 fraction rises in Dublin with the exception of Dublin West, the former seat of both Brian Lenihan Snr and Brian Lenihan Jnr. Fianna Fáil is seen as a typical catch-all party. R. Ken Carty wrote of Fianna Fáil and Fine Gael that they were 'heterogeneous in their bases of support, relatively undifferentiated in terms of policy or programme, and remarkably stable in their support levels'. Evidence from expert surveys, opinion polls and candidate surveys all fail to identify strong distinctions between the two parties. Many point to Ireland's civil war politics and feel that the basis for the division is