Earlier quoted context omitted.
I doubt it will affect anyone with a US passport at the border, but it's about time for the USA to adopt the Japanese policy and simply ban all dual citizenship. If you hold a foreign passport or any kind of documents from a foreign country for its citizens, your US citizenship should be revoked and you should be deported.
Why?
And immigrants shouldn't get special privileges that natural citizens cannot, especially special privileges conferred by foreign princes and potentates.