In the buildup to the April 2005 parliamentary elections the party formed an alliance named L'Alternativa with the Parochial Union of Independents Group (GUPI) and Democratic Renewal to contest parish-level seats.[5] The party won six seats at the national level, whilst the alliance won six seats at the parish level. With a total of twelve seats, the party remained in opposition.
In 2010 the APC withdrew its support for the PS-led government, and in 2011 the General Council rejected the government's budget, forcing early elections.[7] The April 2011 parliamentary elections saw the PS receive 34.8% of the vote, reducing its representation to six seats.[7]