Subsequently, UDS leader Mario Floris, a former Christian Democrat, was President of the Region from 1999 to 2001.
After that, the party became a stable regional ally of The People of Freedom (PdL).
In the 2009 regional election, in coalition with the centre-right, the UDS won 3.5% of the vote and got two regional councillors elected (Floris and a member of the New Italian Socialist Party).
In the 2010 provincial elections the party was strongest in the Province of Cagliari, where it won 3.8% of the vote.
[4] In the 2014 regional election the UdS–PN obtained 2.6% of the vote and Floris was once again re-elected to the Council.