One would have to believe these obamanoid sycophants are either too stupid or purposely deceiving in that they cannot see their own argument of only two means of citizenship fails instantly with the acknowledgement that McCain was examined by a Senate committee because of at least two subsets of ‘by birth’ citizenship. The parentage of his Mom and Dad was never in question, but the location of his birth was an issue for folks like Leahy and Barry Soetoro. Scalia, BTW, addressed the subsets of the birth/citizenship issue.
There are several categories under the law of those who will be citizens at birth, but that doesn't mean that each has a different type of citizenship or a different “source” of citizenship. The “source” was that they were born and were eligible under the law.