[Gatún(CraigIsaMangoTreeLawyer)]

One is required to renounce other citizenships, but apparently the U.S. will "allow" such in certain countries.

Not true. If one is born in Panama, as an example, no matter the nationality of one's parents, one is a Panamanian forever. There is no office to where one can go and renounce one's citizenship.

[AmishDude]

Technically, if a naturalized US citizen were to go to Panama to renew his/her Panamanian passport, the US government could do something.

It never happens, though, unless there are other issues.

[Diddley]

Not true. If one is born in Panama, as an example, no matter the nationality of one's parents, one is a Panamanian forever. There is no office to where one can go and renounce one's citizenship

This is interesting. If one is required to renounce allegiancies to other countries in order to become a U.S. citizen, but one won't or can't, then perhaps that person can't become a U.S. Citizen??? (Just a thought.)