american ancestry have swirled for years. going back to her first senate campaign against republican scott brown. >> professor warren claimed that she was a native american, a person of color and as you could see she's not. >> reporter: the oklahoma native described herself as native american in numerous personnel documents early in her teaching career, a revelation that sparked furious backlash. last fall she responded to t the -- the op going criticism which showed distant native ancestry. >> the facts suggest that you have a native american ancestor in your pedigree. >> reporter: that was pans as insensitive and offensive by tribal groups and the senator ultimately apologized. >> i'm sorry for not being more mindful of this decades ago. tribes and only tribes determine tribal citizenship. >> reporter: as warren climbs in the polls, president trump is taking notice and still