New Mexico - Borders Mexico, of which it was once a part.
it is not their country so they need a pass part in order to come to this country and go back
SLovenia
Philippines
Pakistan
Eastern part of Pakistan
It is it's own country.
it once was a colony of the Kingdom of Great Britain.
the south eastern part
Mexico was and is an original country in North America. This is in modern times, when the political subdivision of a continent is a country. Parts of Mexico, as defined by Spanish conquest are now parts of the United States. New Mexico was once part of Mexico, as was Arizona and California. Mexico itself, is not a part of the United States, but parts of the United States were once Mexico.
The only country that is connected to Southern US is Mexico.
No. Canada is a country.