It's "Americans". The country is "the United States of America".
Don't try on purpose please.
Reminds me of that Saturday Night Live sketch of a Terrorist or something News Show where they'd always end their sentences in "Death to America," and then the last guy talks about how it could apply to other places, saying things like "Do we mean all the Americas?" He ends with saying something like "So please, when
*something*, say Death to the United States."
you're joking right
"US citizens"
Well, that doesn't work out in some situations.