Morena holds a dominant position in trader consensus for the June 2027 Mexican Chamber of Deputies election due to consistent polling leads of roughly 24 points over the nearest rival and the structural advantages of incumbency under President Claudia Sheinbaum. Recent surveys from September and October 2026 show Morena at 39-41% voting intention, well ahead of PAN and PRI, while the party advances candidate registration and maintains coordination with PT and PVEM allies for seat allocation. Opposition efforts to form state-level alliances have not yet narrowed the national gap, and internal coalition negotiations continue without derailing Morena’s organizational momentum. These factors sustain the implied probability that Morena will secure the largest share of the 500 seats.