In the 2006 general election NPS won 5.4% of the votes cast and took three seats and stood in opposition to the 2006-2008 governing coalition formed by the Party of Socialists and Democrats, Popular Alliance and United Left.

In the 2008 general election the party participated within the Freedom List that won 1,317 votes (6.28%) and got 4 seats.

The Freedom List is part of the centre-right Pact for San Marino coalition.

This electoral coalition won 35 seats out of 60 in the Grand and General Council in the Sammarinese parliamentary election, 2008 gaining 54.22% of the national vote and a governmental majority of 5.

The alliance has formed the new government of San Marino.