Leon Trotsky.
Leon Trotsky
The only one who comes to mind is Leon Trotsky, he was exiled during Stalins reign (to Switzerland?) he was later assassinated by the NKVD sometime during the 30s in Mexico.
FDR - Churchill - Stalin .
Joseph Stalin
STALIN
Yes Stalin was an autocratic ruler. He let power get into his head as he was supreme ruler.
Joseph Stalin was the Soviet leader responsible.
Joseph Stalin
Stalin came to power in stages after the death of Lenin (1924). By 1928 Stalin was the sole dictator of the USSR.
Joseph Stalin, who was in power from 1924 until his death in 1953, was the soviet leader who stayed in power the longest.
He was adverse to Stalin taking over, so he probably wanted Trotsky to come to power.
Nikita Khrushchev. There was a battle for succession of power in the Soviet Union (an interregnum) from 1953 (when Stalin died) to 1956 (when Khrushchev came to power).