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.
Thomas Kelly (Sinn Féin politician) not join Cumann na nGaedheal along with other pro-Treaty Sinn Féin TDs in 1923, nor did he contest the 1923 general election. In 1930 he joined Fianna Fáil and was elected as a Fianna Fáil Teachta Dála (TD) at the 1933 general election for Dublin South. He remained a TD and councillor until his death in 1942. Thomas Kelly (Sinn Féin politician) Thomas Kelly (13 September 1868 – 20 April 1942), sometimes known as Tom Kelly, was an Irish Sinn Féin and later Fianna Fáil politician. He was a book and picture dealer before entering politics. He was a founder