There is no “universal rule of birthright citizenship”
What Wang overlooks is that the “dominions of the sovereign” by American, non-monarchical governance, would mean that the state to which one has citizenship, and is thus allegiant, is the sovereign, not the locale they are temporarily occupying, even as a newborn.
Common sense dictates that what is owed to any nation, is what was stated previously, and that is the visitor (ambassador or tourist) conforms to the laws of the nation they are temporarily visiting, be it legally (by visa, etc.) or illegally. The second visitor mentioned being subject to removal for contravening the very first law – that of gaining entry according to that nation’s laws.
Wang again, “The purpose of the Fourteenth Amendment was to embrace that universal rule of birthright citizenship to embrace and incorporate the common law exceptions with the single additional exception of the preexisting exception for tribal Indians that we had in the United States, which is an analogous exception, and that's the closed set of exceptions.”
There is no “universal rule of birthright citizenship.” Otherwise, it would have been practiced not only here but abroad. Wang has an unfortunate penchant for invoking words such as “all,” “everyone” and here, “universal.” This is not a legal standard. It is all-inclusivity which exists nowhere.
Reaching to try and prove a point through the Indian nations, whether those born outside the reservation are or are not citizens, Wang relies on dubious arguments pitting the two against each other. Native inhabitants of tribal lands delineated by treaty, indeed had and have a singular relationship to the United States, asserting some autonomy over their designated lands but still operating under the stewardship of the U.S. government. This would be why Justice Gorsuch made the following distinction: