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
History of Sinn Féin were instructed to join the organisation and a newspaper, "United Irishman", was launched. Paddy McLogan served as President of Sinn Féin. The re-organisation yielded fruit during the Border Campaign which was launched on 12 December 1956. In the Irish general election of 1957 Sinn Féin fielded 19 abstentionist candidates and won four seats and 6.5% of the popular vote. The introduction of internment and the establishment of military tribunals hindered the IRA campaign and it was called off in 1962. In the 1961 General Election the party won no seats and its vote dropped to 3.2%. Tomas MacGiolla was elected