A Red World

Disclaimer
There are many points of divergence in this one...

-Kerensky joined the Communist Party of USSR

-The Secretary General of the Communist Party of USSR is elected democratically between the high members since 1923, and until 1927.

-The 1929 crisis have been much stronger than in our timeline.

In USSR
December 30th 1922 : USSR is proclaimed.

June 1st 1923 : The Secretary General of the Communist Party of USSR is elected democratically. Stalin's Anti-Reformist Union wins the election and 327 seats at the Supreme Soviet against Trotsky's Left Opposition (250 seats) and Kerensky's Reform Movement (23 seats).

January 1st 1924 : Reform Movement's members "disappear". Elections are redone. This time Trotsky wins with 309 seats against Stalin's 291 seats.

January 9th 1924 : Stalin tries to make a "Third Russian Revolution", but this revolution fails. After the Assembly voted yes to exile Stalin.

January 1st 1925 : Trotsky wins the election (347 seats). Second is Kamenev (202 seats) and third is Bukharin (51 seats).

January 1st 1926 : Trotsky wins the election with 578 seats. Bukharin is second with 20 seats and Kamenev only got 2 seats.

January 1st 1927 : Trotsky wins all the seats of the Supreme Soviet.

January 11th 1927 : "Full powers" law. Trotsky is now at full command of the USSR. The Supreme Soviet has a minor role.

January 1st 1928 : Trotsky wins all the seats again.

January 1st 1929 : Trotsky wins all the seats again

Late 1929 : USSR is the only country  on which the crisis has no influence.