I was born and raised in the state of Maine - I, too, was told that my great great grandmother was a full-blooded Native American. I don't know her name or any details about her tribe - I was just given a photograph of her. I am the mirror image of her (with the exception of her beautiful black hair) - and I do have the high cheekbones. However, unlike Elizabeth Warren, I have never identified myself as anything other than American. When you don't have the proof, you don't make the claim!