In Mass, document supports Warren's Cherokee claim

Christopher Child of the New England Historic and Genealogy Society said Monday he found an 1894 document in which Warren's great-great-great grandmother is listed as Cherokee, which would make the Harvard Law School professor 1/32nd American Indian. Child says more research is needed.

Warren is the likely challenger to Republican U.S. Sen. Scott Brown.

Questions have arisen over whether Warren has represented herself as a minority during her academic career. She says she doesn't remember doing so.

Warren says she wasn't aware that Harvard had listed her as a Native American faculty member in the 1990s.

Brown's campaign manager says the situation "raises serious questions" about Warren's credibility.