The recent indictment of José Luis Rodríguez Zapatero has shaken the foundations of the coalition and its parliamentary support. Government allies such as ERC, Junts, and Podemos have expressed their dismay, describing the event as "messed up" and "a blow to the heart of many left-wing people." The former president, considered a moral compass and a key shadow negotiator, thus loses his ability to mediate in crucial moments for Pedro Sánchez's government.

After learning about the 88 pages of the indictment order, the initial caution of parties like the PNV has been nuanced. However, Zapatero's figure has been fundamental in recent legislatures. ERC spokesperson Gabriel Rufián has highlighted his role in "mediating without asking for anything in return" in "almost everything good that has happened politically in this country" in recent years.

Zapatero's influence dates back to the negotiations for Pedro Sánchez's investiture in 2019, where he mediated to reach agreements. His work also extended to contacts with EH Bildu and Pablo Iglesias, paving the way for government formation. In the last legislature, he was again key in contacts with Junts after the break with Santos Cerdán, meeting with Carles Puigdemont to advance on the amnesty and Catalan financing.

Despite his role as a majority-builder, Zapatero's relationship with the PNV has been less fluid recently. Lehendakari Imanol Pradales has demanded explanations from the former president regarding an event he considers "very serious and unprecedented," showing the most forceful reaction among the allies.