**Recent electoral code reforms in Hidalgo have clarified rules for the 2027 state congress elections, including candidate registration timelines, gender parity, and proportional representation, giving parties advance certainty ahead of the vote.** Morena maintains a leading position in statewide preference surveys, often in alliance with PVEM and PT, reflecting its national momentum and local organizational strength. PVEM benefits from coalition negotiations and district allocations, while PRI and PAN retain competitive bases in certain municipalities and among opposition voters. The presence of additional registered parties, including newer national and local options, fragments the field further. With no single force holding a decisive edge in early polling and coalition strategies still evolving, trader odds reflect this balanced uncertainty, where shifts in candidate slates, turnout patterns, or formal alliances could separate the frontrunners before the 2027 contest.