The term "Native American" is often used to refer to the indigenous peoples of the United States, who have cultural and historical ties to the land. Mexicans, on the other hand, are people of Mexican descent, many of whom have ancestral ties to both indigenous peoples and European settlers.
The identification of Native American status is typically based on cultural, linguistic, and political criteria, rather than solely on citizenship or geographic location. Therefore, Mexicans who do not have significant cultural or ancestral connections to indigenous American tribes may not be considered Native Americans.
Overall, while Mexico may have included California in the past, the term "Native American" is usually reserved for indigenous peoples of the United States, and Mexicans generally are not considered part of that group.