Mexico's senate has passed a constitutional amendment that would allow election results to be annulled on grounds of foreign interference, drawing criticism from opposition groups.

The bill was presented by President Claudia Sheinbaum and defines foreign interference as "illicit financing, propaganda, the systematic dissemination of misinformation, digital manipulation, and the intervention of foreign governments or agencies."

Opposition groups have criticized the amendment, arguing it could give the ruling party excessive power to overturn electoral outcomes. The measure represents a significant change to Mexico's election laws and procedures.

The constitutional amendment adds foreign interference as a new legal basis for challenging and potentially nullifying election results in the country. The legislation outlines specific categories of activities that would constitute grounds for such challenges.

The amendment now moves through Mexico's legislative process as part of broader discussions about election integrity and foreign influence in democratic processes.