Mexico City (CNN) – The ruling coalition in Mexico will lose its deserving majority in the Chamber of Deputies Elections This Sunday, according to preliminary figures released by the National Electoral Commission (INE).

This decision would prevent President Andres Manuel Lopez Obrador from carrying out important legislative and constitutional reforms without the help of the opposition. However, the ruling coalition is expected to maintain a simple majority in the lower house.

Morena, the left-wing Lopez Obrador party, received about 35% of the vote. Morena and one of her government partners, the Green Party, are expected to win between 265 and 292 of the 500 seats in the lower house, according to INEI’s initial figures. Morena has 256 seats, but will lose at least 50 seats after the midterm elections. It will win 190 to 203 seats after Sunday’s session, according to the INE.

Preliminary and final results are expected next week.

The match was spotted Referendum on Lopez Obrador, Was elected in 2018 after campaigning for Mexico to address the violence and corruption plagued by its “warmth, not bullets” strategy for decades.

Lopez Obrador’s populist style – he sold Mexico’s presidential plane and now travels on business planes – promised to address economic inequality and corruption, helping to maintain his personal popularity, especially among many lower and middle class Mexicans. Rather than answering press questions about his policies, his daily press meetings are often a way to strengthen his views and political base.

People line up to vote on June 6, 2021, at a polling station in Atsagolco, Guerrero, Mexico.

Critics of the president, however, say he has failed to stop the ground wars of organized crime that have plagued Mexico for the past two decades. Meanwhile, several former politicians have attacked Lopez Obrador for allegedly disrespecting the checks and balances of the Mexican political system.

Sunday was voted by waves of violence in the months leading up to Election Day, in which nearly 100 politicians were killed. At least 96 politicians have been assassinated since the election campaign began in September last year, according to a report by risk management consultancy Edeltect. At least 35 of the victims were candidates for public office.

This Sunday afternoon, human remains were found at at least two polling stations in the state of Baja California, while in the state of Sinaloa, several polling stations were forced to close early after facing threats from armed groups.

Morena’s two main rivals will win more councils, the INE said.

The Conservative National Action Party (BAN) will go from 77 seats to 106-117 in the lower house. The Institutional Revolutionary Party (PRI), which ruled Mexico until 2000, won 63 to 75 of the 48 pre-election seats.

Sunday’s election is considered the largest in Mexican history. More than 93 million voters were invited to cast their ballots for the 21,000 seats elected at the three levels of government. Nationally, participation is estimated at 51.7 to 52.5%, according to INE.

CNN ‘s Juan Carlos Boss contributed to this report.