**PAN holds the strongest position among opposition parties to finish second in the 2027 Chamber of Deputies election, according to trader consensus reflected in current pricing.** Recent national polls, including those from Buendía & Márquez, Enkoll, and LaEncuesta.mx in September and October 2026, consistently place Morena first at 35–41% while showing PAN ahead of or tied with PRI and MC among the fragmented opposition, typically in the 11–17% range. The PAN’s decision to contest independently after ending its prior alliance with the PRI, combined with its established national structure and performance in certain state-level surveys, supports this edge. PRI and MC trail closely in most measurements, with limited recent shifts that would alter the ordering. Morena’s coalition partners remain well behind. The June 2027 vote, which renews all 500 seats under the mixed electoral system, leaves room for late developments such as alliance talks or turnout patterns to influence final seat shares.