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>> “Why did this happen?” <<
Because the term “natural born” injected a vagueness that might be manipulated in the manner that you employ.
They wanted the terms to be “Citizen,” and “Naturalized Citizen” to eliminate the confusion.
Cruz is a citizen, but not a naturalized citizen.
Capiche?
Why then, wasn't the term natural born citizen removed from the eligibility requirements in the Constitution? If they wanted to eliminate confusion wouldn't this have been necessary? Isn't it more sensible to assume that they were correcting an error as it pertains to the description given, especially in light of the fact that the entire reason for the natural born requirement was to eliminate the possibility of someone having dual allegiance become President?