Doesn’t Section I of the 14th Amendment define U.S. citizenship?
“All people born or naturalized in the United States are citizens of the country and the state where they live.”
Define ‘naturalized’.
You misquoted the 14th Amendment, and left out a most important phrase.
All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside.
In other words, foreigners cannot give birth here and claim citizenship of their child.