The Committee included representatives of the Petrograd City Council, the Pre-Parliament, the Central Executive Committee of the Soviets of the First Convocation, the Executive Committee of the All–Russian Council of Peasant Deputies, the Central Executive Committee of the Navy, the Central Committees of the Menshevik, Socialist Revolutionary, "People's Socialist", Constitutional Democratic parties, the postal–telegraph and railway unions, factions of the Mensheviks and Socialist Revolutionaries, who left the Second All-Russian Congress of Soviets and others.