The defeat will prevent President Andres Manuel Lopez Obrador from adopting important legislative and constitutional reforms without the help of opposition parties. However, his ruling coalition is expected to retain a simple majority.
Lopez Obrador’s left-wing political party, Morena, won about 35% of the vote. Morena and her managing partner, Partido Verde, are expected to win between 265 and 292 of the 500 seats in the lower house, according to preliminary data from the National Electoral Institute (INE). Morena has 256 seats, but will lose at least 50 after the gap. He is expected to win between 190 and 203 places after Sunday̵
The results are preliminary, and the final results are expected next week.
The race was widely seen as a referendum on Lopez Obrador, who was elected in 2018 following a campaign to fight violence and corruption that has plagued Mexico for decades with its “hugs, not bullets” strategy.
Human remains were found in at least two polling stations in the state of Baja California, while in the state of Sinaloa, several polling stations were forced to close earlier after threats from armed groups.
Morena’s two main opponents are expected to take seats, according to INE.
The Conservative National Party for Action (PAN) will move from 77 seats to about 106 to 117 seats in the lower house. The Institutional Revolutionary Party (PRI), which held power in Mexico under one-party rule until 2000, is expected to win between 63 and 75 seats, out of 48.