Indians have had a very long history of being denied to vote. Up until 1970, the methods were very blatant, where some states would allow Indians to vote in national elections but not state and local elections, despite the Stanley Supreme Court decision in 1927, which affirmed the right for Indians to vote. Since then, more subtle methods have been used by many states to discriminate against American Indians. For example, here in Texas, one of the reasons the voter ID law was shot down was because a gun license counted as ID, while a valid tribal ID did not. A Federal court has now intervened in another case, where Nevada would not put polling places on reservations, thus making it harder for Indians to vote because of very long distances to the polling places. Good job by the courts. In case nobody knows, American Indians are also US citizens, and should be treated like American citizens.
Article is here.
Article about the court decision a week ago is here.
NOTE: Don't give me any crap about states rights here. States don't have the right to discriminate.