In 1989, Slovenia passed amendments to its constitution that asserted its sovereignty over the federation, its right to
secede and set foundations to a
multi-party system. These amendments were bitterly opposed by the leadership of
Yugoslavia under
Slobodan Milošević. On 23 January 1990, the Slovene delegation, headed by
Milan Kučan, left the
Party Congress of the League of Communists of Yugoslavia, leading to the collapse of the all-Yugoslav party. On 4 February 1990, the League of Communists of Slovenia changed its name to the
League of Communists of Slovenia – Party of Democratic Renewal (, ZKS-SDP); shortly afterwards, it began negotiations with the
Democratic Opposition of Slovenia for the establishment of a multi-party system. In April 1990, the reformed Communists lost the elections to the
DEMOS coalition. The party discarded the ZKS part of its name around 1992, even though it had ceased to be a Marxist-Leninist/Titoist party long before then. It eventually evolved into the
Social Democrats, which is still one of the major parties in independent Slovenia. ==Party leaders==