I'm curious about this because my wife is Mexican-American and she has family voting in today's election. The thing is, these family members have not lived in Mexico for the past 30 years. One of them was born in Mexico but moved to the U.S. when she was a baby.
I think I would feel uncomfortable if there were so many people who were born in the U.S. but chose to live another country most of (or basically all of) their lives deciding who the leaders are. Why should they have a say in who the President is when the policies ultimately won't effect them?