Ted Cruz
Ted Cruz
Ted Cruz was born outside the territory of the United States, in Canada. His U.S. birth citizenship was controlled by the nationality law in effect at the time of his birth. Ted Cruz acquired U.S. citizenship at birth. Canada may have considered him a Canadian citizen, but whatever Canadian law did is of no concern to the United States.
If conferrence of citizenship by a foreign nation controlled U.S. citizen status, consider if the Republic of Congo conferred Congolese citizenship upon all non-black persons born in the United States. Only black persons born in the United States would be eligible to be President.
For a really questionable candidate, you have John McCain, apparently born an alien.
A 1937 law fixing a problem with previous law stated in relevant part, "Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That any person born in the Canal Zone on or after February 26, 1904, and whether before or after the effective date of this Act, whose father or mother or both at the time of the birth of such person was or is a citizen of the United States, is declared to be a citizen of the United States."
Question: Can one born an alien in 1936 become a natural born citizen by declaration in 1937?