https://amgreatness.com/2018/11/02/how-progressives-killed-birthright-citizenship/

Birthright Citizenship and Its Allies
By Pedro Gonzalez on American Greatness .

Explains what “jurisdiction” means in this context, no other allegiance but to the U.S. Even American Indians were found to not be citizens under the 14th amendment because of their tribal allegiance which is to a sovereign nation. Congress quickly passed a law making them citizens. Other rulings such as diplomats children are not citizens exist. However there is no ruling on illegals. Therefore the matter needs to get before the Supreme Court where there is a good chance of a ruling that children of illegals are not citizens because they have an allegiance to the country of the parents.

To get the matter before the court you need a vehicle, a case, and an executive order seems like an excellent choice for such a vehicle.

Midterm elections 2018: How to move to Canada? Barbra Streisand …
https://www.usatoday.com/story/…move-canada-barbra-streisand/1838909002/
9 hours ago – Barbra Streisand moving to Canada over midterms? … Barbra Streisand told the New York Times she may move to Canada if Republicans keep their grip on the House. But Americans rarely do after elections.
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Among the many promises Dems never keep….

As I wrote in the post, the proposal is not to “do away with birthright citizenship.” The proposal is to do away with it in certain situations.

But you are correct that a birth certificate saying a person was born in the US would therefore not be enough. I don’t know how other countries handle it, but I’m sure there’s a way.
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Other countries are much smaller and have a history of requiring their residents to carry and produce documentation about their status. It’s no accident that the Left started calling illegal immigrants “undocumented” —
However, if birth certificates had to be expanded to include the citizenship status of the parents, we could be in for a real can of worms: we can’t even agree on how to list the children’s or the putative parents’ sex on the forms now!

This paragraph intrigued me, and pretty much tells you why our situation now is so fraught.

“The U.S. Commission on Immigration Reform, led by former Rep. Barbara Jordan, ran from 1990 to 1997. The Commission covered many facets of immigration policy, but started from the perception that the “credibility of immigration policy can be measured by a simple yardstick: people who should get in, do get in; people who should not get in, are kept out; and people who are judged deportable are required to leave”.[5] From there, in a series of four reports, the commission looked at all aspects of immigration policy.[6] In the first, it found that enforcement was lax and needed improvement on the border and internally. For internal enforcement, it recommended that an automated employment verification system be created to enable employers to distinguish between legal and illegal workers. The second report discussed legal immigration issues and suggested that immediate family members and skilled workers receive priority. The third report covered refugee and asylum issues. Finally, the fourth report reiterated the major points of the previous reports and the need for a new immigration policy. Few of these suggestions were implemented.”

https://en.wikipedia.org/wiki/History_of_laws_concerning_immigration_and_naturalization_in_the_United_States