Yes, "Southeastern" in "Southeastern US" should be capitalized as it is part of a proper noun.
Yes, US mail should be capitalized as it is an abbreviation for United States mail.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
It depends on the context. If they preced the name of a continent they do.
No, "sheriff" should not be capitalized unless it precedes the name of the specific sheriff ("Sheriff Johnson served us with a subpoena").
The words "please," "Lindsay's," and "graduation" should be capitalized in the phrase "Please join us as we celebrate Lindsay's graduation."
There are no deserts in the southeastern United States. Most deserts are located in the southwest.
southeastern part of USA depends on agriculture and northwestern part on industry.
The Pacific Ocean.
tennessee
It is a region.
southeastern us or gulfcoast
There are no deserts in th southeastern United States. Deserts are found in the southwestern region.
Yes it is. It is in the southeastern US, below Georgia.
southeastern side of the us
Midwestern,eastern, and southeastern US.
Atlanta
Very very hot