|Main parties in the electoral race:
- Coalition: House of Freedoms / Casa delle Liberta'*
Leader: Silvio BERLUSCONI
Seats won in last Senate election: 177
Seats won in last Chamber of Deputies election: 368
- Coalition: The Union / L'Unione**
Leader: Romano PRODI
Seats won in last Senate election: 125
Seats won in last Chamber of Deputies election: 242
*The House of Freedoms Coalition includes Go Italy (Forza Italia), the National Alliance (Alleanza Nazionale), the Northern League (Lega Nord), the Union of Christian and Centre Democrats (UDC), the Socialist Party – new PSI (Nuovo PSI), the Italian Republican Party, the Liberal Reformers, the Christian Democracy for the Autonomies, plus several far right groups.
** The Union regroups many of the parties that composed the Olive Tree coalition of
centre-left parties in the 1996 and 2001 general elections. Currently, the Union
includes Democrats of the Left (Democratici di Sinistra), Daisy-Democracy is Freedom (Margherita-Democrazia è Libertà), the Communist Refoundation Party (Partito della Rifondazione Comunista), Federation of the Greens (Federazione dei Verdi), Party of Italian Communists (Partito dei Comunisti Italiani), Italian Democratic Socialists (Socialisti Democratici Italiani), Italian Radicals (Radicali Italiani), Italy of Values (Italia dei Valori), Popular-UDEUR (Popolari-UDEUR), The Socialists (I Socialisti), and the Pensioners' Party (Partito dei Pensionati).