Kamala Harris was born in California and she is a United States citizen from birth.
The U.S. Citizenship and Immigration Services' chapter 3 - U.S.Citizen from birth (INA 301 and 309) mentions that a person born in the United State is the U.S.Citizen at birth. It includes a person born to a member of an Indian, Eskimo, Aleutian, or other aboriginal tribes. Kamala Harris was born on October 20, 1964, in Oakland, California, making her a natural born U.S.Citizen. Her father is a Jamaican and mother is an Indian.