Ben Nighthorse Campbell looks like 50% - his dad was FBI (Full Blooded Indian - sorry, got that from a pathetic Val Kilmer movie). Ben’s mom was Portuguese. http://en.wikipedia.org/wiki/Ben_Nighthorse_Campbell
But Fauxcohontas was “careful” to limit her claim to MA, which has had a lot more Senators than other states, and also had a swatch of Injuns.
http://en.wikipedia.org/wiki/List_of_United_States_Senators_from_Massachusetts
#7 in Class one, Harrison Gray Otis, seem to have a Mohawk haircut!