The Ivy League cares a lot about "PC" diversity (race, gender, sexual orientation). But not so much about regional or ideological diversity. In fact, leadership activities and accomplishments that scream "red state" actually reduce your chances of getting into Harvard - being a leader in the ROTC cuts your admissions odds in half ceteris paribus[1].
Poor rural white kids don't go to Harvard.
[1] Ron Unz explores this and other Ivy League admission statistics in "The Myth of American Meritocracy" http://www.theamericanconservative.com/articles/the-myth-of-...