Jurisdiction subject to—is in relation to which government has a claim on you.
How can the US have a claim on a new born baby that is not born of its citizens?
Why would it have a claim.
The writer of the 14th Amendment never said such a thing.
Had Rubio's parents stuck up a liquor store then the U.S. authorities could have arrested, tried, and jailed them. That's quite a claim. While here they were subject to the jurisdiction of the U.S.
How can the US have a claim on a new born baby that is not born of its citizens?
Born in this country. Jus soli.
In the United States House on March 9, 1866
commenting upon Section 1992 of the Civil Rights Act, said that the Act was
(quote)simply declaratory of what is written in the Constitution, that every human being born within the jurisdiction of the United States of parents not owing allegiance to any foreign sovereignty is, in the language of your Constitution itself,
a natural born citizen. (unquote).