[2] The Nationalist Party did not enter the first House of Commons of Northern Ireland despite winning six seats in the 1921 general election.
The party became involved in the Derry civil rights march in October 1968, which ended in violence amidst allegations of police brutality.
As a result, the party withdrew from its role as official opposition on 15 October 1968, following the controversy of two weeks earlier.
Although it was successful for a while in capturing the Republican vote, it faded from view due to the rise of Sinn Féin in the early 1980s.
This chart shows the electoral performance of the Nationalist Party in elections to the Northern Ireland House of Commons