Francisco Javier García Cabeza de Vaca, the ex-governor of Tamaulipas, made the significant decision to renounce his U.S. citizenship back in 2021. This information was brought to light by Sergio Gutiérrez Luna, a member of the opposing political party, who presented documentation asserting Cabeza de Vaca's formal withdrawal from the protections afforded to him by U.S. law. The declaration not only indicates the renunciation of citizenship but also his disavowal of any treaties or conventions that would protect him as a foreign national.

The motivations behind Cabeza de Vaca's decision appear to revolve around his ambitions for public office in Mexico. Specifically, he aimed to pursue a position as a 'plurinominal' deputy in the San Lázaro Congress. This move could be seen as a strategic step to align himself more closely with Mexican politics, possibly to bolster his standing within the political landscape following his term as governor.

Gutiérrez Luna's announcement and revelations serve to incense political rivalries and shed light on the often contentious nature of Mexican politics, especially concerning claims of citizenship and loyalty. As such, this incident raises questions not only about personal ambition but also about the perception of dual citizenship in the political arena, further complicating the dialogue surrounding nationality and political aspirations in the country.