But There’s Still No Evidence Her Parents Were Citizens When She Was Born...
which matters not a whit if "natural born citizen" is the same concept, adapted to a republic, as Blackstone's "natural born subject", rather than Vattel's "natives". As almost all the notions in the Constitution take English common law as a given (e.g. habeas corpus, trail by jury, ...) the notion that the Founders were relying on a Swiss political theorist, rather than the framework of English common law is silly. Yes, one of them subsequently wrote that the common law of the United States is not the same as British common law, but that is because by then precedents had diverged.
Obama "birtherism" based on the belief he was born in Kenya at least had the virtue of being based on a theory about his birth that would have made him not a natural born citizen under the Blackstone-based interpretation. Harris "birtherism" requires the Vattel-based interpretation and is, in my view, completely unsupportable.