Simple question: Did he list himself as a foreign student? Let the transcripts that answer the question.
Next best is you had an outstanding undergraduate record ~ top grades, top activities, top top (and at enormous state universities too).
Then there are the folks who got in because Grandpa's bequest had a stipulation about his descendants.
Assuming there are any positions left, there are legacies ~ and then there are LEGACIES!
There are folks who are known to be the umpteenth generation decendant of the founders, or the colonial governors of Massachuetts ~ and an almost casual review of Colonial Dames and DAR records will let you know if you have a chance of better consideration (way beyond grades and money) if you mention such ancestors in your application.
Besides being a Harvard legacy (his supposed baby daddy graduated from the school AFTER having been recruited), Obama has ancestors who founded the school. That's what his grandma was into ~ genealogy ~ and she probably even found her only grandson a free ride!