A long-time member of the Italian Socialist Party (PSI), in 1994 he founded the Labour Federation (FL) and joined the Democrats of the Left (DS) in 1998. Since then, he was the leader of the Socialist faction within DS. He was deputy from 1994 to 2006.
- "Camera dei Deputati - XIV legislatura - Deputati - la scheda personale". legxiv.camera.it. Archived from the original on 24 January 2016. Retrieved 6 June 2022.
- "socialistiliberali.it.html". www.socialistiliberali.it.