swedish, and really sort of all over europe. >> when i met with him in 2015, we tried to unravel this. >> michael d'antonio, author of the book, the truth about trump, gave us a recording of his exchange with trump about his heritage. >> there was a short period of time when your dad and then you talked about being swedish instead of being german. >> well, there is some swedish in there someplace. >> do you think he swwas sensite to -- >> it could have been. i never asked him that question. it could have been. but my father was german. >> the family lore is similar to warren's own description of how she says she learned of her heritage. >> my brothers and i learned from our mother and our daddy and our grandparents who we are. >> reporter: in 2016, one of trump's cousins said the family hid its german heritage in part to make it easier to sell apartments to jewish tenants. that cousin, john walter,