With five candidates competing in the October 9-10 first round for the social-democratic primary organized by the Parti socialiste, Place publique, and Gauche républicaine et socialiste, the field remains fragmented ahead of the vote to select a 2027 presidential nominee. Raphaël Glucksmann of Place publique leads in assessments of support, yet the presence of Olivier Faure, Jérôme Guedj, Emmanuel Maurel, and Ségolène Royal distributes votes across distinct wings and prevents any single contender from securing an absolute majority. Recent televised debates highlighted policy and strategic differences without producing consolidation. This structure aligns with trader expectations that a runoff on October 16-17 will be required, reflecting the open primary's voter base of roughly 140,000 participants and the typical dynamics of multi-candidate French left primaries.