Us v. Wong kim ark in 1898 held that you're a citizen if you're born here, unless
1) your parents are foreign diplomats, I.e., subject to the laws of that other nation; or
2) you were born in a part of the United States under the control an invading army, I.e., subject to the law of that other nation; or
3) you were born to parents subject to the laws of an untaxed Indian tribe (a concept that afaik doesn't exist any more, I think they're all taxed now).

None of this applies to Kamala, so she's obviously a citizen from birth, a natural-born citizen, and eligible for vp/president.

But she's black, so birthers gotta find a way to call her illegitimate.....