During the first session of the Congress, 86% were card-carrying members of the CPSU. This number declined steadily as more people resigned from the party, however new major parties were not quick enough to form, leaving a large percentage of the Congress non-partisan. CPSU was banned by president Yeltsin in November 1991 due to the attempted August Coup. The party collapsed completely during the collapse of Soviet Union, and in Russia it was replaced by CPRF.