Why are they under the auspices of the United Nations if they're American Indians living in this country?
Remember the little story of the camel outside the tent who asked if he could "just put his nose inside the tent" since he was cold?
They are not under United Nations, they have formed a nation of their own, I didn't read all the details, but take a quick look at the links, I think it was the last one that says they have their own Constitution.
I have always heard of the Cherokees as the Cherokee Nation.