Morena holds the strongest position among contenders for control of the Sonora state congress in the 2027 elections, consistent with its 42.5% implied probability in trader pricing and recent polling averages around 40% support. National trends show the party maintaining majorities in 26 state legislatures heading into the cycle, while in Sonora its current bloc of 11 seats provides an incumbency edge. Opposition parties remain fragmented, with PAN at 28%, PRI at 25%, and Movimiento Ciudadano at 12% reflecting vote splits that limit any single challenger's path to a plurality or majority. September and October 2026 surveys confirm Morena's lead in the broader Sonora electoral environment, though outcomes hinge on coalition dynamics with PT and PVEM plus turnout in key municipalities. The June 2027 vote date leaves room for shifts from candidate selection or economic factors.