It was founded in 1926 by William Redmond and Thomas O'Donnell in support of the Anglo-Irish Treaty, a close relationship with the United Kingdom, continued membership of the British Commonwealth and conservative fiscal policy.
A third group to which it sought to appeal, according to Manning (1972), comprised middle-class economic sectoral interests whose members were alienated by the policies of the Cumann na nGaedheal government, such as licensed vintners.
"[1] In the June 1927 general election, the National League won eight seats in Dáil Éireann and entered opposition.
However, two League TDs opposed this tactic—Vincent Rice, who defected to Cumann na nGaedheal, and John Jinks, who was absent from the vote.
The financial strain of two general elections in four months took its toll on the small parties, and the National League declared bankruptcy in 1928.