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D’Onofrio helpfully brought that document to the fore in 2008.

Because that would certainly have overturned the U.S,. Supreme Court in Wong Kim Ark. Not.

Wong Kim Ark at 169 U.S. 658-59:

It thus clearly appears that, by the law of England for the last three centuries, beginning before the settlement of this country and continuing to the present day, aliens, while residing in the dominions possessed by the Crown of England, were within the allegiance, the obedience, the faith or loyalty, the protection, the power, the jurisdiction of the English Sovereign, and therefore every child born in England of alien parents was a natural-born subject unless the child of an ambassador or other diplomatic agent of a foreign State or of an alien enemy in hostile occupation of the place where the child was born.
III. The same rule was in force in all the English Colonies upon this continent down to the time of the Declaration of Independence, and in the United States afterwards, and continued to prevail under the Constitution as originally established. In the early case of The Charming Betsy, (1804) it appears to have been assumed by this court that all persons born in the United States were citizens of the United States, Chief Justice Marshall saying: "Whether a person born within the United States, or becoming a citizen according to the established laws of the country, can divest himself absolutely of that character otherwise than in such manner as may be prescribed by law is a question which it is not necessary at present to decide." 6 U. S. 2 Cranch 64, 6 U. S. 119.
In Inglis v. Sailors' Snug Harbor (1833), 3 Pet. 99, in which the plaintiff was born in the city of New York about the time of the Declaration of Independence, the justices of this court (while differing in opinion upon other points) all agreed that the law of England as to citizenship by birth was the law of the English Colonies in America. Mr. Justice Thompson, speaking for the majority of the court, said: "It is universally admitted, both in the English courts and in those of our own country, that all persons born within the Colonies of North America, whilst subject to the Crown of Great Britain, are natural-born British subjects."

Slaughterhouse Cases, 83 U.S. 36, 73 (1872)

The first observation we have to make on this clause is that it puts at rest both the questions which we stated to have been the subject of differences of opinion. It declares that persons may be citizens of the United States without regard to their citizenship of a particular State, and it overturns the Dred Scott decision by making all persons born within the United States and subject to its jurisdiction citizens of the United States. That its main purpose was to establish the citizenship of the negro can admit of no doubt. The phrase, "subject to its jurisdiction" was intended to exclude from its operation children of ministers, consuls, and citizens or subjects of foreign States born within the United States.

https://fam.state.gov/FAM/08FAM/08FAM030101.html#M301_1_1

[State Department, Foreign Affairs Manual]

8 FAM 301.1-1 INTRODUCTION

c. Naturalization – Acquisition of U.S. Citizenship Subsequent to Birth: Naturalization is “the conferring of nationality of a State upon a person after birth, by any means whatsoever” (INA 101(a)(23) (8 U.S.C. 1101(a)(23)) or conferring of citizenship upon a person (see INA 310, 8 U.S.C. 1421 and INA 311, 8 U.S.C. 1422). Naturalization can be granted automatically or pursuant to an application. (See 7 FAM 1140.)
d. “Subject to the Jurisdiction of the United States”: All children born in and subject, at the time of birth, to the jurisdiction of the United States acquire U.S. citizenship at birth even if their parents were in the United States illegally at the time of birth:
(1) The U.S. Supreme Court examined at length the theories and legal precedents on which the U.S. citizenship laws are based in U.S. v. Wong Kim Ark, 169 U.S. 649 (1898). In particular, the Court discussed the types of persons who are subject to U.S. jurisdiction. The Court affirmed that a child born in the United States to Chinese parents acquired U.S. citizenship even though the parents were, at the time, racially ineligible for naturalization;
(2) The Court also concluded that: “The 14th Amendment affirms the ancient and fundamental rule of citizenship by birth within the territory, in the allegiance and under the protection of the country, including children here born of resident aliens, with the exceptions or qualifications (as old as the rule itself) of children of foreign sovereigns or their ministers, or born on foreign public ships, or of enemies within and during a hostile occupation of part of our territory, and with the single additional exception of children of members of the Indian tribes owing direct allegiance to their several tribes. The Amendment, in clear words and in manifest intent, includes the children born within the territory of the United States, of all other persons, of whatever race or color, domiciled within the United States.” Pursuant to this ruling:
(a) Acquisition of U.S. citizenship generally is not affected by the fact that the parents may be in the United States temporarily or illegally; and that;
(b) A child born in an immigration detention center physically located in the United States is considered to have been born in the United States and be subject to its jurisdiction. This is so even if the child’s parents have not been legally admitted to the United States and, for immigration purposes, may be viewed as not being in the United States.