The United States in 1961 recognized the allegiance of the child at birth to be that of the adult father or adult parent, while reserving the possibility the child could elect to renounce natural born foreign allegiance and natural born foreign citizenship upon reaching the majority age of an adult and thereafter exercise only U.S. native born citizenship.
Is that so? Where does it say that in the Constitution or U.S. code?
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The State Department Has Always Recognized And Abided By Foreign Laws Concerning US Citizens Born With Dual Nationality.