""" All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws. """
The Supreme Court held in Bolling v. Sharpe that the due process clause of the 5th Amendment imposes the equal protection responsibility on the federal government as well as the individual states.
I'm not clear on how dual-citizenship works when you naturalize to the US, but are there not situations where they have to give up citizenship to their country of origin? Does that mean these people are permanently left in a degraded legal state with no home country, where they would have full legal rights, to return to should the DHS decide they've over stepped their bounds on Facebook?
However, the US do not recognize the concept of dual citizenship. Meaning that an Italian-American is always seen as just an American by the US government. Once you become American you are American, you are not a XXX-American.
One such a case is China. If a Chinese citizen gets the passport of another country they lose their original Chinese citizenship (if China knows about the new passport.)
I wonder what happens if they are born in countries like the USA that give citizenship at birth. Do they have to forfeit one of the two citizenships? And when, at birth by decision of the parents or later on by their choice?