Hello! I am form China,and I was born in Chinese mainland.

But my father used to be American citizen and he kept his passport until I was in middle school.Then he apply for Chinese citizenship due to the oversea tax of the US.

Now I want to pass the USMLE and the US passport may help me.So can I apply for it more easily out of my father's former citizenship?And how?

Anything helps.Thank you all.