“U.S. nationals, including dual nationals, must use a U.S. passport to enter and leave the United States. Dual nationals may also be required by the foreign country to use its passport to enter and leave that country. Use of the foreign passport to travel to or from a country other than the United States is not inconsistent with U.S. law.”
말 그대로 법적으로 이중국적자는 미국 떠날 때
반드시 무슨일 있더라도 미국 여권 사용하란말임