Leader of Sinn Féin joined opposing sides with De Valera leading the Anti-Treaty faction, while Griffith joined the Pro-Treaty faction, which later became Cumann na nGaedheal. De Valera’ successor John J. O'Kelly was one of four leaders who served for brief periods of time as Sinn Féin’s party membership declined in favour of Fianna Fáil and Fine Gael. In 1937, Margaret Buckley became the first female President of Sinn Féin. During her thirteen years as leader, she vastly improved the relations between the IRA and the party. She was succeeded by Paddy McLogan and Tomás Ó Dubhghaill who both helped rebuild party support in
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