The Social Democratic Party (Estonian: Sotsiaaldemokraatlik Erakond, SDE) is a centre-left political party in Estonia. It is currently led by Lauri Läänemets.. The party was formerly known as the Moderate People's Party (Estonian: Rahvaerakond Mõõdukad). The SDE has been a member of the Party of European Socialists since 16 May 2003 and was a member of the Socialist …

The Communist Party of Estonia (Estonian: Eestimaa Kommunistlik Partei, abbreviated EKP, was a political party in Estonia.. The EKP was formed November 5, 1920, when the Central Committee of the Estonian Sections of the Russian Communist Party (Bolsheviks) was separated from its mother party. During the first half of the 1920s hopes for an immediate world revolution were …