There are four states that border Mexico: California, Arizona, New Mexico, and Texas. Mexico is the country to the south of the United States. All of the states that now border Mexico were once part of Mexico. The states on the border share some of their culture with Mexico. Those states are California, Arizona, New Mexico, and Texas.
Section "Learn and Explore" uses official instructions and media files of US Citizenship and Immigration Services, US National Museum of American History, The Smithsonian Institution and other governmental and public organization.