Jus soli citizenship is based on the land of birth and jus sanguinis is citizenship based on parentage. In the oral arguments of Tuan Anh Nguyen v. INS (No. 99-2071), Justice Scalia made it clear that his view is that natural born citizenship, the requirement to be president, is based on jus soli (birth in the United States).
Here is the relevant section from the transcript:
Justice Scalia: … I mean, isn’t it clear that the natural born requirement in the Constitution was intended explicitly to exclude some Englishmen who had come here and spent some time here and then went back and raised their families in England?
They did not want that.
They wanted natural born Americans.
[Ms.]. Davis: Yes, by the same token…
Justice Scalia: That is jus soli, isn’t it?
[Ms.] Davis: By the same token, one could say that the provision would apply now to ensure that Congress can’t apply suspect classifications to keep certain individuals from aspiring to those offices.
Justice Scalia: Well, maybe.
I’m just referring to the meaning of natural born within the Constitution.
I don’t think you’re disagreeing.
It requires jus soli, doesn’t it?
The transcript is fascinating listening.
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