Síle de Valera voters to give preference votes for Anti H-Block candidates in the 1981 general election, a comment which caused controversy. She held her Dáil seat until the 1981 general election, when the constituency boundaries were redrawn. She sought re-election in the new constituency of Dublin South. This caused tension within the local Fianna Fáil party, for one of the other candidates, Séamus Brennan, was a prominent opponent of Haughey. De Valera polled relatively well but narrowly failed to be elected, losing to another Fianna Fáil candidate, Niall Andrews. She contested the constituency again at the February 1982 general election, but saw
Éamon de Valera the IRA dumped their arms rather than surrender them or continue a now fruitless war, de Valera returned to political methods. In 1924, he was arrested in Newry for "illegally entering Northern Ireland" and held in solitary confinement for a month in Crumlin Road Gaol, Belfast. During this time, de Valera came to believe that abstentionism was not a workable tactic in the long term. He now believed that a better course would be to try to gain power and turn the Free State from a constitutional monarchy into a republic. He tried to convince Sinn Féin to accept this