Which is why I think context is important. We're hardly in the middle of the Civil War right now. While there can be some pretty distinct differences between states these days, we are one singular nation. It really depends on the emphasis your trying to place. If I'm talking about the country as a whole, "The United States" is the name of that one country, and I would treat it as a singular noun.It should be plural, as in "The United States are" not "The United States is".
In fact, before the U.S. Civil War, that's how the country was referred to, as a plural, because it was a collection of several sovereign states, not a centralized nation.
Yepper. I just finished watching the Ken Burns, The Civil War mini series where consultant/author Shelby Foote makes that exact statement.
But I could also see instances where it would be more appropriate to treat it as plural.
Before the Civil War, it was "The United States are...". After the Civil War, it became "The United States is...". Being in the middle of a (Civil) war has nothing to do with context

Try to keep up.