what's wrong with dual citizenship?
If one takes up citizenship in another country, then the US will consider that person to no longer be a citizen. Incidentally, the same is not necessarily true the other way around. If a person of another country becomes a US citizen then, depending upon the laws of the home country, that country may still consider her/him to be a citizen. There are situations where the US may recognize dual citizenship. For example, a person may have acquired US citizenship through a parent and still be a citizen of another country. The dual citizenship situations generally pertain to citizenship-by-birth, not when the US citizen naturalizes in another country
BTW I love the SNL skit with Christopher Walken saying, " I have dual citizenship, with the United States and Florida.
Sir, Florida is part of the United States.
CW: "Don't push your politics on me buddy!"