Mexico is close to finalising a constitutional reform requiring presidential candidates, state governors and the Mexico City mayor to renounce any second citizenship, after a majority of the country's 32 state legislatures approved it following passage in both chambers of Congress. President Claudia Sheinbaum says it protects sovereignty from foreign interference, while critics argue it restricts political rights and is meant to block opponents such as billionaire Ricardo Salinas, who has since said he holds no dual citizenship. The rule would apply to candidates from 2028, so it would not affect the 2027 midterms, and it makes Mexico one of few Latin American countries, with Cuba and Venezuela, to impose such a ban.