Morena holds the clearest edge in the Tlaxcala Congress election market at 61.5% implied probability, reflecting consistent polling leads of 40-53% for the party and its allies ahead of the June 6, 2027, vote. Recent internal selection of Ana Lilia Rivera as state coordinator for the Fourth Transformation has consolidated Morena’s position despite reported tensions with Governor Lorena Cuéllar over preferred successors. Opposition parties including PRI, PAN, and MC register single-digit or low-double-digit support in September-October surveys, with no unified front emerging. The formal electoral process begins December 6, 2026, leaving room for coalition negotiations involving PT and PVEM but little evidence yet of shifts that would alter the current trader consensus favoring Morena plurality control of the legislature.