- Will Morena win the most seats in the 2027 Mexico City Congress election?56¢
- Will PAN win the most seats in the 2027 Mexico City Congress election?20¢
- Will PRI win the most seats in the 2027 Mexico City Congress election?5¢
- Will PVEM win the most seats in the 2027 Mexico City Congress election?11¢
- Will PT win the most seats in the 2027 Mexico City Congress election?3¢
- Will MC win the most seats in the 2027 Mexico City Congress election?26¢
Legislative elections to elect the 66 members of the Congress of Mexico City are scheduled to take place on June 6, 2027. This market will resolve according to the political party that wins the greatest number of seats in the Congress of Mexico City as a result of this election. Parties will be primarily ranked by the number of seats won in the specified election. If two or more parties are tied on seats, ties will be broken by the total number of valid votes received by each party's list in the proportional representation vote, with higher vote totals ranking higher. If parties remain tied, ties will be broken by alphabetical order of the listed party names. This market will resolve to the party that occupies the highest finishing position after applying this ranking. Seats will be attributed to the political party under which each elected deputy is officially registered in the final results published by the Instituto Electoral de la Ciudad de México. For district (mayoría relativa) seats won by a coalition or common candidacy, the seat will count toward the party to which the elected deputy is assigned in the official results, pursuant to the coalition agreement registered with the Instituto Electoral de la Ciudad de México, and not toward the coalition as a whole. Proportional representation seats will count toward the party to which they are allocated. Subsequent changes in party affiliation or parliamentary-group membership will not be considered. If the results of the specified election are not definitively known by March 31, 2028, 11:59 PM ET, this market will resolve to "Other". This market will resolve based on the results of the elections, as indicated by a consensus of credible reporting. In the case of ambiguity, this market will resolve solely based on the official results as reported by the governments of Mexico City and Mexico, including the Instituto Electoral de la Ciudad de México (https://www.iecm.mx/).