Politburo - 7 to 9 leading Party members, chosen by Central Committee, made key decisions affecting policy, took over from larger Central Committee which proved unmanageable in making important decisions. Met daily under Lenin and became more important than Sovnarkom. Members included Lenin, Zinoviev, Kamenev, Trotsky and Stalin. 1919 - relative power of state and Party shown in decision to make Politburo in control of secret police rather than Sovnarkom.