The dominant market pricing on cancellation for the 2026 United Left primary stems from sustained fragmentation across left-wing formations, including confirmed non-participation by La France Insoumise and the French Communist Party alongside the Socialist Party's July decision to conduct its own closed primary instead. Organizers faced repeated setbacks from internal party votes, candidate withdrawals such as Clémentine Autain's in July, and the absence of a unified framework among L'Après, Les Écologistes, and Debout! participants. The scheduled October 11 vote did not proceed as a joint selection process for the 2027 presidential contest. Late reversals by major parties or an unexpected last-minute agreement to revive the original format represent the narrow paths that could still shift resolution away from cancellation.