Sorry, Congress does not have the power to change the ,meaning of the Constitution by passing a law.
It is, in fact, interesting that they felt these children needed a law to define their status, which strongly implies that it wasn’t defined in the Constitution itself.
It wasn’t until 1874 that the Supreme Court ruled that the term “natural born citizen” was not defined in the Constitution.
“The Constitution does not say, in words, who shall be natural born citizens. Resort must be had elsewhere to determine that.”—Minor v Happersett
The fifth section of the 14th Amendment, adopted in 1868 gave Congress the power to define citizenship.
Section 5. “The Congress shall have power to enforce, by appropriate legislation, the provisions of this article.”
This is what I was thinking about that as well. Obviously they didn't consider this group covered under whatever it was they regarded as the proper meaning, because if they had, they wouldn't have felt the need to make a law to address this lack.
That they created a law is proof that they didn't regard this group as being covered under existing law.