Claim: Nikolay Krestinsky joined the Russian Social Democratic Labor Party and sided with the Bolsheviks, eventually getting elected to their Central Committee.
Evidence: Krestinsky joined the Russian Social Democratic Labor Party in 1903 and sided with its Bolshevik faction. After the February Revolution, which overthrew monarchy in Russia, he proved to be a capable organizer and was elected to the Central Committee of the Bolshevik party on 3 August 1917 (Old Style).