Marcel Pauker got involved in a political fight with
Vitali Holostenco, reflecting the struggle between the Bucharest section and that of the
Ukrainian SSR that had taken hold of the Party's wing inside the Soviet Union around the proceedings of the 4th Congress in
Kharkiv. Again in the Soviet Union, Pauker was reprimanded by the
Comintern. Banned from political activities, he was sent to assist as an engineer in the industrial expansion of
Magnitogorsk (in western
Siberia), a job he undertook between 1930 and 1932. At the same time,
Joseph Stalin, whose priority at the time was showing the façade of "unity" within his subject Parties, had Holostenco removed from his position. In 1935 Pauker was appointed a member of the
Secretariat of the Romanian Communist Party. He spent time in
Prague until 1937, when he returned to the Soviet Union. He fell victim to the
Great Purge: arrested by the
NKVD on March 21, 1937 and held in the infamous
Taganka Prison, Marcel Pauker was first interrogated over a year later, being presented with the charge of
espionage in favour of Romania. Records show that he finally admitted to the charge (most likely after being subjected to
torture). Consequently, he was put on trial, sentenced to death and
executed by
shooting. ==Rehabilitation==