Izquierda Unida opened the internal process for primaries (Spanish: primarias) on 20 September 2026 to select a candidate for the post of Spanish prime minister. The move was announced at the start of a meeting of the Coordinadora Federal, the party’s highest decision-making and debating body between congresses. Party leader Antonio Maíllo reaffirmed that the vote fulfilled a requirement under the party statutes while also strengthening the party’s role in the ongoing talks on a merger of left-wing forces.
The aim of the primaries is to put forward a proposal backed by Izquierda Unida for possible negotiations with Movimiento Sumar, Más Madrid and his party Comuns Maíllo had already made clear that he would not stand himself. On Sunday, the Coordinadora Federal discussed a draft set of rules intended to govern both the selection of the lead candidate and the drawing up of constituency lists. Decisions on arrangements such as electronic registration, the electoral roll and the timetable are expected shortly.
The move comes amid intensive talks between parties to the left of the Social Democrats, which have been discussing procedures, candidates and branding for a united front at the next parliamentary elections elections. According to party sources, Izquierda Unida sees the launch of the primaries as a normalised internal party process. Political observers also see it as a signal to potential partners to clarify how a joint candidate will be selected.
It remains unclear whether Movimiento Sumar, Más Madrid and the Comuns will agree on a shared set of rules or prefer parallel processes. It is also uncertain whether a joint electoral roll will be created or each organisation will maintain its own register. What is clear is that the timetable now under way puts Izquierda Unida in a position to propose a name in the coming weeks. It will then be up to its partners to accept that candidate, agree on a joint primary format or adopt an alternative selection model.
According to consistent media reports and party statements on Sunday, Izquierda Unida is explicitly framing its initiative in the context of a possible alliance to the left of the PSOE. The party stresses that primarias are a democratic process that strengthens the legitimacy of subsequent negotiations. Predictions about the prospects of a united election campaign remain speculative; the key factors in the coming days are the detailed rules and the willingness of the participating organisations to support them.
Editor: Phillipe Schmidt-Araguin (Article created with AI assistance).