The party emerged in 1993 as the Sardinian section of the Segni Pact. This list was launched by Mario Segni, a former Christian Democrat from Sardinia, and was composed of former Christian Democrats and Liberals.
During the years in government of Silvio Berlusconi (2001–2006), the RS started to be critical of the centre-right. In 2003 the RS contributed to the foundation of the new national party of Mario Segni named Pact of Liberal Democrats. This party was on the ballot at the 2004 European Parliament election and won only a misere 0.5% (7.4% in Sardinia). In the same year RS won 5.9% of the vote at the regional election, having four Reformers elected to the Regional Council.
At the 2009 regional election, the party was part of the centre-right coalition in support of Ugo Cappellacci, who was elected president. The RS won 6.8% of the vote (having their strongholds in the provinces of Oristano and Olbia-Tempio, where they gained 10.0 and 8.7%, respectively[3]) and five regional councillors (including Cossa) plus one (Franco Meloni, a former leading member of the Sardinian Action Party) elected in Cappellacci's regional list.[4]
At the 2010 provincial elections, the party was strongest in Oristano (9.0%), Olbia-Tempio (8.9%) and Cagliari (7.3%).[5] In 2011 Fantola was the centre-right candidate for mayor of Cagliari, but he was severely defeated by his left-wing opponent.[6]
In the 2019 regional election, the RS supported the winning President, Christian Solinas of the Sardinian Action Party, won 5.0% of the vote and three regional councillors.
In the 2024 regional election, the RS, a member of the losing centre-right coalition, obtained 7.2% of the vote and doubled its regional councillors to four.
Popular support
The electoral results of the RS in Sardinia since 1994 are shown in the table below.