Nikolay Krestinsky joined the Russian Social Democratic Labor Party and sided with the Bolsheviks, eventually getting elected to their Central Committee.
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). 
