The Social Democratic Party "Harmony" (Latvian: Sociāldemokrātiskā partija "Saskaņa"; Russian: Социал-демократическая партия «Согласие», romanized: Sotsial-demokraticheskaya partiya «Soglasiye», S),[nb 1] also commonly referred to as Harmony (Saskaņa), is a social-democratic political party in Latvia.

[8] The former chairman of the party, Nils Ušakovs served as the Mayor of Riga from 2009 to 2019,[9] and was Harmony's candidate for the office of Prime Minister of Latvia in 2014.

Internationally, "Harmony" is a member of the Progressive Alliance[10][11] and the Party of European Socialists.

[13] In 2018, after disagreements with Ušakovs, he defected[14] to the Latvian Russian Union, and the party lost its representation in the European Parliament until the 2019 European Parliament election in Latvia, when Ušakovs and his ally, former Vice Mayor of Riga Andris Ameriks (a member of Honor to serve Riga) were elected.

[22] It previously had ties with United Russia until 2017,[23] when Harmony joined the Party of European Socialists.