Spain's Left Wants 1 Million Voters to Pick Their Next Leader — and It Could Blow Up the Whole Alliance

Spain's left-wing parties are racing to unite behind a single candidate for the next general election — and they want ordinary citizens, not just party members, to choose who that will be.

Podemos, the left-wing party led by Irene Montero, has proposed holding open primaries to select one candidate for all parties to the left of the ruling Socialists (PSOE). Under the plan, any citizen could vote in the primary, not just party members [240045]. Montero announced the proposal after being named her party's candidate for the upcoming general election.

The move has been welcomed by Izquierda Unida (IU), a smaller left-wing coalition. IU leader Antonio Maíllo called it a strategic "turnaround," noting that Podemos had previously refused to negotiate with his party — which it once dismissed as part of a "government of war" [242165]. "I value the turn Podemos has taken," Maíllo said. "They have made a leap of responsibility that should be celebrated."

But the two parties still disagree on how the primary should work. IU wants to build a new voter roll from scratch, requiring members and supporters of all progressive parties to register individually. Podemos objected to this approach in an earlier regional vote, saying it undervalued its own members [242165]. The parties also use different methods for counting votes.

The proposal puts pressure on Sumar, the left-wing platform led by Labor Minister Yolanda Díaz. Sumar has spent months delaying the announcement of its new brand and its candidate for the general election. The relationship between Podemos and Sumar is tense — Podemos broke its alliance with Sumar in December 2023 after internal fighting [240045].

If Sumar accepts the primary proposal, Montero could potentially win and become the top candidate for the entire left. If Sumar refuses, Podemos will accuse it of blocking left-wing unity — a goal Sumar claims to support. Sources from Sumar responded that they are "building a common space" and that it is "good news that Podemos understands" this phase, but added: "we go step by step" [240045].

Maíllo said the left must agree on a candidate and a joint brand "this month or in October" [242165]. IU's federal council approved a resolution in March urging Sumar, Comuns and Más Madrid to speed up the selection of a successor to Díaz, who resigned as head of the left-wing coalition's ticket on February 25. Six months later, that space remains unfilled, while Podemos has moved first.

The proposal also targets other left-wing parties, including ERC. However, ERC has already rejected forming a coalition with non-independence parties [240045]. Maíllo commented on ERC leader Gabriel Rufián, who has been mentioned as a possible consensus candidate, saying: "Rufián's problem is that he won't take his cap off" — meaning Rufián has not decided whether to become a federal leader.

For now, Sumar says it remains focused on building the broadest possible front. But the clock is ticking toward the election.