[1] Although the congress was scheduled to be held in 2025, party leader Pedro Sánchez had expressed his intention to advance it to late 2024,[1] with this being confirmed on 30 August 2024.

This raised the possibility that the congress could have taken place earlier than planned to elect a successor.

[6] Finally, Sánchez announced that he would not be resigning despite a "harassment and bullying operation" and that he would be fighting "even harder" as prime minister.

The highest percentage figure in each polling survey is displayed in bold, and the background shaded in the candidate's colour.

Polls show data gathered among PSOE voters/supporters as well as Spanish voters as a whole, but not among party members, who are the ones ultimately entitled to vote in the primary election.