Arizona, California, New Mexico, and Texas.
Mexico is the southern country that is the closest neighbor to the United States. Mexico has a border with the United States that has a total length of 1954 miles.The country is Mexico.
The United States.
Canada and Mexico share a border with the United States.
Canada or Mexico
Both Canada and Mexico border the US.
Mexico is the country on the southern border of the United States.
California, Arizona, New Mexico, and Texas are the US states on the border with Mexico.
All the States mentioned border Mexico.
texas, new mexico, arizona
New Mexico is a US State and Mexico is a soverign country that shares a border with the United States of America.
The states that border Mexico are California, Arizona, New Mexico and Texas...
Depending on how you define Southwestern states, you have Arizona and New Mexico for certain. California and Texas can be added to your list if your definition is broad enough. All of these states border Mexico. None of the states on the Canadian border would be considered "southwetern".