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
Left-wing nationalism Green Party Irish nationalism has been left wing nationalism since its mainstream inception. Parties such as Sinn Féin and the SDLP are left-wing nationalist parties, but there is a strand of nationalism in Ireland that is towards the centre-right, for example Fianna Fáil are a centre-right republican party, but has only ever contested elections in the Republic of Ireland. Right wing nationalist outlooks, and far right political parties in general, were few and far between in Ireland until relatively recently, with the foundation of the unregistered National Party (Ireland, 2016) and other less relevant groups and parties. In Europe, a