Recent party switches have reshaped the current LXXVII Legislature, with PAN, PRI, and MC each reaching 11 seats while Morena fell to six after multiple departures, including to independents and MC. These realignments, occurring alongside the formal launch of the 2026-2027 electoral process on October 6, underscore shifting alliances ahead of the June 2027 vote for 42 congress seats. Traders price PAN highest, followed by Morena and smaller parties, reflecting PAN-PRI coordination on legislative control and early 2027 gubernatorial polling that favors aligned figures. The contest remains balanced because no bloc holds a clear structural edge, and outcomes hinge on candidate nominations, coalition pacts, and voter turnout in concurrent state races. Late developments in precampaigns or further defections could widen gaps before voting.