| Sumario: | The 2022-2023 electoral reform—President López Obrador's "Plan B"—aimed to profoundly transform the Mexican electoral system. Due to its numerous unconstitutional issues, it was controversial and eventually invalidated in its entirety by the Supreme Court. It has been said that this decision demonstrates how institutions and checks and balances have curbed democratic backsliding in Mexico. However, the Court annulled this reform exclusively due to violations of the legislative procedure and did not analyze any of the substantive aspects of Plan B. Consequently, after 2024, similar or identical reforms could be approved. This article argues that the Court's decision provided a forceful solution for the 2024 elections, but constituted a limited precedent for future reforms.
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