

I’m not from the US, but I believe the last time one of those entities meaningfully strayed from the line of the US government was 164 years ago. So, saying the US is basically a confederation with its members acting independently on the world stage is a bit of a stretch, don’t you think?
Nope they didn’t do that. Neither did I. But maybe you should look up, what it means to be a citizen.
My question was rhetorical, and this doesn’t even answer it in the slightest.