Sioux Indians "withdraw from the USA"? Or not!
It turns out that these reports are nearly all just a rehash of Russell Means' press releases and not based on any real reporting at all.
And here is the worst part. The bulk of the news outlets that have picked up this story are foreign press agencies like the Agence Presse France, The Telegraph, and Radio Netherlands, all of whom presented this as if it was somehow legal and binding instead of an activist's scheming.