This study examines how Slovenian communist leadership’s views on the Yugoslav state framework evolved in the late 1980s. To this end, the actions of Slovenian leaders during the procedure of amending the Yugoslav constitution and the discussions in the Slovenian party headquarters on the subject of relations in the federation are analyzed in detail. On the background of growing nationalism in public opinion in Slovenia, the communist leaders of the republic put themselves in an increasingly antagonistic position vis-à-vis the federal center. During 1987, they rejected several proposals for changes to the Yugoslav constitution, which they had initially agreed to based on an incorrect assessment of Slovenian public opinion. Then, in the summer of 1988, in the atmosphere of the Slovenian Spring, local leaders began to favor the weakening of the ties between the Yugoslav republics and redefinition of Yugoslavia as a confederation. Simultaneously, Slovenian politicians were also increasingly questioning some primary assumptions about the existence of the common state and radicalized their political methods in terms of promoting Slovenian interests at the federal level.