It was usually allied with Social Democratic Party of Croatia.

The two largest political parties in Croatia are the Croatian Democratic Union and the Social Democratic Party of Croatia.

As a member of opposition alliance that included nominally left-wing Social Democratic Party of Croatia he entered Sabor in 1995.

The leader of the opposition was Zoran Milanović, leader of the Social Democratic Party of Croatia.

Since its founding in 1990, elections within the Social Democratic Party of Croatia were held numerous times.

The Social Democratic Party of Croatia also saw some controversy in the process of nominating a candidate.

Between 2000 and 2009, he was a prominent member of the Social Democratic Party of Croatia (SDP).

In the campaign for 2000 parliamentary elections they, together with many other rock musicians, supported Social Democratic Party of Croatia and other opposition parties.

He is a member of the Social Democratic Party of Croatia.

The party decided not to participate, thus allowing Communists, recently rebranded as the Social Democratic Party of Croatia, to make a sweep of the region.