Neighbor of Mex. (3)

I believe the answer is:

(Other definitions for usa that I've seen before include "Trumpland?" , "Initially, a great federation" , "country" , "Briefly, a great federation" , "A great national federation" .)

I've seen this clue in the L.A. Times Daily, The Washington Post, the USA Today, The Mirror and The Star Tribune.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.