The child always follows the allegiance of the father. http://www.usnaturalborncitizen.com/meaningofnaturalborn.html

Harris was born Oct. 20, 1964, and her father was a citizen of Jamaica at the time of her birth.

Specifically, Chapter 2 (entitled Citizenship) of the Jamaica Constitution, Section 3C states:

Every person born outside Jamaica shall become a citizen of Jamaica –

1. on the sixth day of August 1962, in the case of a person born before that date; or

2. on the date of his/her birth, in the case of a person born on or after the sixth day of August 1962,

if, at that date, his/her father or mother is a citizen of Jamaica by birth, descent, or

registration by virtue of marriage to a citizen of Jamaica.

http://www.orlytaitzesq.com/kamalas-parents-were-in-the-united-states-on-student-visa-from-jamaica-and-india-is-kamala-harris-a-citizen-of-india-and-jamaica-at-birth-and-as-such-not-eligible-for-the-position-of-vice-president/