Carl Winberg was a Swedish

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 Communist leader.

Winberg was the organizer of the Swedish rail workers’ union and a member of the Swedish Social Democratic Party

Swedish Social Democratic Party

The Swedish Social Democratic Workers' Party, , contesting elections as 'the Workers' Party – the Social Democrats' , or sometimes referred to just as 'the Social Democrats' and most commonly as Sossarna ; is the oldest and largest political party in Sweden. The party was founded in 1889...

. In 1917 he sided with the left opposition in the party split and this soon became the Communist Party of Sweden.

Carl Winberg was member of the Riksdag

Parliament of Sweden

The Riksdag is the national legislative assembly of Sweden. The riksdag is a unicameral assembly with 349 members , who are elected on a proportional basis to serve fixed terms of four years...

 1911–1917 (social democrat) and 1919–1930 (communist).

In 1929, Winberg was expelled together with the majority of the Communist Party’s members as the Party followed the Stalinist course. In the 1930s, Winberg was active in the Communist opposition led by Karl Kilbom

Karl Kilbom

Karl Kilbom was a Swedish Socialist politician.-Youth:As the son of a blacksmith, Karl Kilbom grew up in a working-class family of Walloon origin in the small town of Österby outside Uppsala, where he started working in the steel mills at an early age.In the year 1900, a socialist agitator visited...

, independent from Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

and opposing Stalinism.