Huh?
Congress has the Constitutional power to write laws to determine who may be a "natural born Citizen?"
Since when?
Please cite that authority in the Constitution.
Like all laws, the U.S. Code is based on the constitution and, as we all know:
“The Constitution does not, in words, say who shall be natural born citizens. Resort must be had elsewhere to ascertain that.” — Minor v. Happersett (1874).
Since the Constitution states in Article 1 Section 8 as one of the powers of congress is to establish the rules of naturalization.