How did the Government change?

Communist party' politburo set up and took over the Sovnarkom
End of elections for key positions in the soviet
Nomeklatura - 1925 a list of jobs that only communists could do (loyalty is more important than skill)
Tenth Party Congress - Ban on factions 1921
Russian Soviet Federal Republic - January 1918 (the new name for Russia)
End of free elections for local soviet