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Mexico’s lower house rejects Sheinbaum’s electoral reform, ‘Plan B’ looms

By Thomson Reuters Mar 11, 2026 | 3:44 PM

By Diego Oré and Raul Cortes

MEXICO CITY, March 11 (Reuters) – An electoral reform proposed by Mexican President Claudia Sheinbaum was rejected on ​Wednesday by lawmakers who criticized the bill ‌as a bid by the ruling party to concentrate power.

The bill in the lower house of Congress fell short of the required supermajority because Sheinbaum’s usual allies from the ‌Green ​Party (PVEM) and the Labor Party (PT) withheld ⁠their support, even ⁠as it secured 259 votes in favor and 234 against, with one abstention.

The setback marks a rare rift in the coalition between the ruling ​Morena party and its partners, a bloc that has been essential for passing constitutional reforms since ⁠2021.

Sheinbaum introduced the initiative in ⁠late February, arguing that it would ​strengthen democracy, increase citizen participation and cut electoral costs ​by a quarter. The proposal included a reduction ‌in Senate seats and increased oversight of electoral bodies.

Pablo Gomez, head of the electoral reform commission, said in late February that Mexico’s electoral system costs ⁠reached $3.55 billion in 2024.

Despite the defeat, Sheinbaum this week suggested a “Plan B” that would involve modifying secondary laws rather ⁠than the ‌constitution. Such a move would only ⁠require a simple majority to pass.

According to ​electoral ‌experts, this alternative path could allow ​for cuts ⁠to the National Electoral Institute (INE), changes to proportional representation, and new regulations on the use of artificial intelligence in political campaigns.

(Reporting by Raul Cortes, Diego Ore and Natalia Siniawski; Editing by Daina Beth Solomon ​and David Gregorio)