Sinn Féin for nine years. (It merged with two other organisations to form Fine Gael in 1933.) Anti-Treaty Sinn Féin members continued to boycott the Dáil. At a special "Ard Fheis" in March 1926, de Valera proposed that elected members be allowed to take their seats in the Dáil if and when the controversial Oath of Allegiance was removed. When his motion was defeated, de Valera resigned from Sinn Féin; on 16 May 1926, he founded his own party, Fianna Fáil, which was dedicated to republicanising the Free State from within its political structures. He took most Sinn Féin TDs with him.
Éamon de Valera from June 1919 to December 1920 and had mixed success. One negative outcome was the splitting of the Irish-American organisations into pro- and anti-de Valera factions. He met the young Harvard-educated leader from Puerto Rico, Pedro Albizu Campos, and forged a lasting and useful alliance with him. De Valera managed to raise $5,500,000 from American supporters, an amount that far exceeded the hopes of the Dáil. Of this, $500,000 was devoted to the American presidential campaign in 1920, helping him gain wider public support there. In 1921 it was said that $1,466,000 had already been spent, and it is unclear