The SDP presidency has assessed that Vinkovic's political decisions were in contravention of the SDP platform and that his activities harm the party's reputation, the leading opposition party said in a statement on Thursday.
This move was prompted by Vinkovic's refusal to walk out of a coalition with the regional HDSSB party in Djakovo, a town in Osijek County.
The SDP leadership insists on the severance of coalitions with the HDSSB in Osijek County after the HDSSB refused to accept the Supreme Court's guilty verdict against Branimir Glavas, one of the HDSSB founders, for war crimes in Osijek.