Approved in the specific vote—with 334 in favor, 109 against, and one abstention—the document stems from an initiative presented by President Claudia Sheinbaum and amends Articles 82, 116, and 122 of the Constitution.

According to the newspaper *La Jornada*, the reform—which sparked a debate lasting over 10 hours, well into the night—aims to ensure that candidates for the aforementioned offices hold only Mexican nationality and cannot acquire, invoke, or assert any other.

The ruling Morena party and its allies argued that while dual nationality is legitimate for personal life, governing Mexico “demands a single constitutional loyalty”—a stance linked to the defense of sovereignty.

The opposition, for its part, argued that the initiative infringes upon the political rights of Mexican nationals residing abroad who hold dual nationality.

“Holding two or more nationalities may entail rights, duties, and protection mechanisms vis-a-vis other states, but the mere coexistence of this political tie creates an actual conflict of loyalties,” Morena coordinator Ricardo Monreal emphasized during the discussion.

He noted that once the constitutional amendment is promulgated, Congress will debate the implementing legislation, which will detail the procedure for renouncing other citizenship.

In his view, this represents “a historic change to prevent the country from being subjected to undue and blatant interference.”

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