From 2008 to his political engagement in the Democratic Front he was the President of the Central Committee of the Union of Free Trade Unions of Montenegro. Until entering the Democratic Front electoral list in 2012, he was not a member of any political party. On 3 March 2015 Vučinić announced the formation of a new left-wing Workers' Party. Since its foundation, RP is a constituent member of the opposition Democratic Front (DF) alliance.Radnička Partija: Za prava običnog čovjeka, Portal Analitika (March 2015) In March 2019, the Workers' Party left the coalition with Democratic Front.Radnička partija istupila iz DF-a: Ne pristajemo da budemo marginalizovani CdM (March 2019) After his death in October 2019, his son Maksim, succeeded him as the president of the party.
