[Gringo]

Para aclarar mas, estados unidos es una condicion politica y no el nombre de un pais, al igual que reino, republica etc.

y si de Wikipedia se trata:

United States
From Wikipedia, the free encyclopedia
This article is about the United States of America. For other uses of terms redirecting here, see US (disambiguation), USA (disambiguation), and United States (disambiguation).

United States of America


The United States of America (also called the United States, the States, the U.S., the USA, and America) is a federal constitutional republic comprising fifty states and a federal district.

The short form "United States" is also standard. Other common forms include the "U.S.", the "USA", and "America"

The standard way to refer to a citizen of the United States is as an "American". Although "United States" is the official appositional term, "American" and "U.S." are more commonly used to refer to the country adjectivally ("American values", "U.S. forces"). "American" is rarely used in English to refer to people not connected to the United States.[15]

JCC