Morena maintains a commanding lead in trader consensus for the June 2027 Mexican legislative election to renew all 500 Chamber of Deputies seats, driven by its position as the incumbent ruling party under President Claudia Sheinbaum and consistent advantages in national voter preference surveys. Recent polling, including an October 2026 El Financiero survey, shows Morena at 46% support against single-digit figures for PAN, PRI, and MC, reflecting the party's organizational momentum, early candidate coordination for federal districts and governorships, and alliances with PT and PVEM. Opposition parties remain fragmented with limited recent gains, while Morena's public financing edge and territorial strength in most states reinforce the implied probability reflected in current market pricing. The contest remains months away, leaving room for shifts tied to economic conditions or candidate performance.