I was wondering whether there was a dominating, elite of Russians that ensured that all key positions of power within the USSR were solidly within the hands of Russians (akin to Liberia where former American slaves formed the ruling elite in the country whereas its indigineous people formed the lower class). Or was the ruling elite - especially within the CPSU - actually comprised of a multiethnic clique that somewhat adequately reflected the ethnic diversity of the Soviet Union?
Does anyone have any information on that?
/u/Kochevnik81 has previously written on similar themes:
See also Were there any higher ups or people with "real power" in the USSR that were not Russian? by /u/Noble_Devil_Boruta
But more answers could be written, and Kochevnik81 probably has more archival answers.