Michael O'Flanagan States in April 1925 to help Sinn Féin contest a number of by-elections. That summer he was suspended from clerical duties and forbidden to say mass because of his nationalist activities and anti-clerical speeches he had made in America. In March 1926, the Sinn Féin ard fheis narrowly defeated de Valera's proposal to enter the Free State Oireachtas if the Oath of Allegiance were removed. O'Flanagan sided with the majority. De Valera left to found Fianna Fáil, which eclipsed Sinn Féin at the June 1927 election. O'Flanagan remained with the reduced Sinn Féin. Bishop Coyne died in July 1926, but
Progressive Democrats governments four times, on each occasion with Fianna Fáil (1989–1992; 1997–2002; 2002–2007; 2007–2009), and also with the Green Party from 2007–2009. In 2005 Michael McDowell publicly took a firmly anti-republican position and named Gerry Adams, Martin McGuinness and Martin Ferris as members of the IRA Army Council. The convention in Irish politics at this time was not to accuse Sinn Fein politicians of being members of the Army Council, in doing so McDowell broke with convention. He said that until the IRA disbanded Sinn Fein could not be involved in government, North or South. On 7 September 2006 Mary Harney