I was visiting some friends who live on a res in the Dakotas a couple years ago. I'm not sure, but I think there are still some restrictions around the citizenship issue. And it has (or had) to do with whether the Native person lived on the reservation/was on the tribal roles. The tribe/res was considered a sovereign nation and members had no rights as US citizens. This came up because I'm an astrologer and wanted to do some charts for them. When they said they didn't have recorded birth times ,I suggested they contact the state division of vital statistics. They just looked at me. Later someone took me aside and explained that, since they were'nt citizens no records of that kind were kept on them. The laws may have changed-- but if you aren't a citizen there are lot of things that most of us take for granted that you don't get. It would be interesting if they are allowed to vote and be political now. It seemed to me at the time highly unfair that our governments fed and state, can make a lot of decisions affecting alot of people who have no voice in those decisions... I love this country and the principles on which it's founded. Too bad we don't live up to them more often.