Leader of Fianna Fáil Leader of Fianna Fáil The Leader of Fianna Fáil is the most senior politician within the Fianna Fáil political party in Ireland. Since 26 January 2011, the office has been held by Micheál Martin, following the resignation of Taoiseach Brian Cowen as leader of the party. The post of Leader of Fianna Fáil was officially created in 1926 when Éamon de Valera founded the party. De Valera had previously been leader of Sinn Féin and took the Anti-Treaty side during the Civil War. The new party essentially became a home for dissatisfied Sinn Féin TDs who had become disillusioned with
Éamon de Valera the work of Michael Collins and based on three sources: British oaths in the dominions, the oath of the Irish Republican Brotherhood and a draft oath prepared by de Valera in his proposed Treaty alternative, "Document No. 2"). De Valera began a legal case to challenge the requirement that members of his party take the Oath, but the assassination of the Vice-President of the Executive Council (deputy prime minister) Kevin O'Higgins on 10 July 1927 led the Executive Council under W. T. Cosgrave to introduce a Bill on 20 July requiring all Dáil candidates to promise on oath that if