In 1946 a new political party called Clann na Poblachta was formed in Ireland by former Chief of Staff Sean MacBride.
Several of the leading members were also former left-wing IRA members and the party itself espoused itself as Republican.
However, many of the militarists left within the IRA were not eager to support any political party which recognised the legitimacy of Dáil Eireann, and indeed, the IRA banned its members from joining the Clann on the basis of they were not going to be an abstentionist party.
Nonetheless, they watched with curiosity as to how this party would fare.
At first hopes for Clann na Poblachta were high, with some believing it would challenge Fianna Fáil in the Dáil.
However shrewd electioneering by De Valera meant that the Clann did not become the great power they had hoped to be.
They did, however, manage to enter government in 1948 as part of the coalition which made up the Government of the 13th Dáil.
Unfortunately for the Clann, that government's run proved to be somewhat disastrous and permanently dented their support.
In each subsequent election, the Clann received less and less support until it dissolved as a party in 1965.

The failure of Clann na Poblachta reinforced the IRA's doubts about the ability of left-wing political parties to wrestle power out of the hands of Fianna Fáil and Fine Gael and helped spur the IRA towards traditionalism in the 1950s.
However, their initial success did help convince the IRA they would have to marry their military tactics with political tactics.
In 1946 a new political party called Clann na Poblachta was formed in Ireland by former Chief of Staff Sean MacBride. Several of the leading members were also former left-wing IRA members and the party itself espoused itself as Republican. However, many of the militarists left within the IRA were not eager to support any political party which recognised the legitimacy of Dáil Eireann, and indeed, the IRA banned its members from joining the Clann on the basis of they were not going to be an abstentionist party. Nonetheless, they watched with curiosity as to how this party would fare. At first hopes for Clann na Poblachta were high, with some believing it would challenge Fianna Fáil in the Dáil. However shrewd electioneering by De Valera meant that the Clann did not become the great power they had hoped to be. They did, however, manage to enter government in 1948 as part of the coalition which made up the Government of the 13th Dáil. Unfortunately for the Clann, that government's run proved to be somewhat disastrous and permanently dented their support. In each subsequent election, the Clann received less and less support until it dissolved as a party in 1965.
The failure of Clann na Poblachta reinforced the IRA's doubts about the ability of left-wing political parties to wrestle power out of the hands of Fianna Fáil and Fine Gael and helped spur the IRA towards traditionalism in the 1950s. However, their initial success did help convince the IRA they would have to marry their military tactics with political tactics.
Irish Republican Army (1922–1969)