The US does not care if you have any other citizenships but some countries do. E.g. Japan will revoke its citizenship on the citizens who obtained another one [

The US does not care if you have any other citizenships but some countries do. E.g. Japan will revoke its citizenship on the citizens who obtained another one [1] https://en.wikipedia.org/wiki/Japanese_nationality_law#Loss_of_citizenship https://en.wikipedia.org/wiki/Japanese_nationality_law#Loss_...