Member of the Christian Democracy, he was elected to the Sardinian regional council for the first time in 1974.
He is the cousin of the Forza Italia senator, Emilio Floris, former mayor of Cagliari.
After the 1999 elections, after joining the Democratic Union for the Republic founded by Francesco Cossiga, he became president of the regional government for the second time due to the non-acceptance of the programmatic declarations of both the governments formed by Mauro Pili and that formed by Gian Mario Selis.
At the end of the legislature he founded the Union of Sardinians with which he presented himself as a candidate for governor in the regional elections of 2004, obtaining over 35,000 preferences and 3.6% of the votes.
He came back in support of the candidate Ugo Cappellacci also in the 2009 election, in the United Sardinia listI.