Imelda Castro Castro's designation in late August 2026 as Morena's state coordinator for the defense of the Fourth Transformation positions her as the party's presumptive nominee for Sinaloa governor in the June 2027 election. This followed the resignation of Rubén Rocha Moya amid U.S. charges and subsequent interim leadership changes, prompting national party leadership to consolidate behind Castro, a former senator with roots outside the prior governor's inner circle. Traders assign her an 84.5% implied probability based on Morena's dominance in recent state contests and the absence of competitive internal challengers advancing past the coordination stage. Lower-priced alternatives, including María Teresa Guerra Ochoa and other registered aspirants, reflect limited momentum outside narrow factional support. Opposition candidates from PRI and other parties remain further back pending formal nominations.