I am a Peruvian, living in Hungary with my family(hungarian wife and two kids) and i have the hungarian residence visa. We have a petition for the green card together which has been approved already.
Immigration - 2 Answers
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1 :
If you have and Hungarian passport then you can. hope this will work
2 :
Check with US Embassy in Hungary. http://hungary.usembassy.gov/contact.html
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