Imelda Castro Castro leads trader consensus at 67% for the June 2027 Sinaloa gubernatorial election due to her August 2026 designation as Morena’s state coordinator for the defense of the Fourth Transformation, backed by President Sheinbaum and party leadership after distancing from prior governor Rubén Rocha Moya amid scandals. Internal Morena surveys and recent independent polls place her ahead of rivals, reflecting the ruling alliance’s organizational edge and preference levels above 40%. Mario Zamora Gastélum trails at 21% as the main opposition figure under PRI-PAN coalition talks, while lower-priced names such as Paloma Sánchez Ramos and others signal fragmented challenger positioning. Traders price these probabilities based on the pre-campaign phase, alliance negotiations, and scheduled candidate definitions ahead of the 2027 vote.