Comhairle na dTeachtaí Council of State, had Éamon de Valera as President. In 1926 de Valera resigned as President, left the Sinn Féin party and founded Fianna Fáil, which in 1927 entered the Fourth Dáil. Comhairle na dTeachtaí, never more than a symbolic body, was thereby rendered defunct. In 1930 Cumann na nGaedheal TDs alleged in the Dáil that de Valera had addressed Comhairle na dTeachtaí in December 1926, after the foundation of Fianna Fáil; this was to cast aspersions on de Valera's commitment to the Constitution of the Irish Free State. Comhairle na dTeachtaí Comhairle na dTeachtaí was an Irish republican parliament
Éamon de Valera by historians as a positive one, and a biography by Tim Pat Coogan alleges that his failures outweigh his achievements, with de Valera's reputation declining while that of his great rival in the 1920s, Michael Collins, is rising.The most recent work on de Valera by historian Diarmaid Ferriter presents a more positive picture of de Valera's legacy. Bertie Ahern, at a book launch for Diarmaid Ferriter's biography of de Valera, described de Valera's achievements in political leadership during the formative years of the state: One of de Valera's finest hours was his regrouping of the Republican side after defeat in