There are 8 states that can be considered "southwest states" -- California, Arizona, New Mexico, Texas, Nevada, Utah, Colorado, and Oklahoma.
The first four (CA, AZ, NM, TX) have borders with Mexico. The other four do not.
Oklahoma was previously known as the Indian Territory. It is located in the southwestern region of the United States and does not share a border with a foreign country.
Mexico borders the Southwestern states of Arizona, New Mexico and Texas.
Santa Fe is the capital of the state of New Mexico. This is considered to be the Southwestern part of the United States.
Maine is the only state in the United States that is bordered by six states (New Hampshire, Vermont, Massachusetts, and New York) and one foreign country (Canada).
The state of Texas shares its southern border with Mexico.
Oklahoma was previously known as the Indian Territory. It is located in the southwestern region of the United States and does not share a border with a foreign country.
Oklahoma
Mexico borders the Southwestern states of Arizona, New Mexico and Texas.
Spain is a country located in southwestern Europe.
If you mean NEW Mexico, it is a state located in the southwestern United States.
make a treaty with a foreign country
Foreign Policy is how the country will interact with non-state actors.
No foreign country owns any part of a US state.
cambodia
As you do not state which country you are from we cannot say who is 'foreign'.
Foreign Policy is how the country will interact with non-state actors.
Southwestern is located in the state of Texas.