[8] In June 2014, the PSC's internal current Avancem, which had been established in May 2012 and was led by deputy in the Parliament of Catalonia Joan Ignasi Elena,[9] split from its mother party and allied with NECat.

[16][17] As merger discussions continued, Avancem dropped out on 12 November, citing political disagreements with Moviment despite a "total agreement" existing with NECat.

[18][19] An agreement between NECat and Moviment was reached on 20 November,[20] and ten days later both parties would officialize their merger into the newly-established "Left Movement" (MES).

[26] Under her leadership, the party, which had considered joining the electoral coalition being negotiated by Podemos and ICV,[27] ultimately brought itself into the Junts pel Sí pro-independence alliance with ERC and Democratic Convergence of Catalonia (CDC) ahead of the 2015 Catalan regional election.

[28][29] On 9 July 2016, Alfons Palacios replaced Casamitjana as party leader,[30] and since 2017 it has been part of the Republican Left of Catalonia–Catalonia Yes alliance.