This paper, on the one hand, explores the legal bases, both constitutional and statutory, of U.S. "birthright" citizenship and the "natural born" citizenship required for one's eligibility to serve as President (or Vice President) of the United States. It goes on to discuss the interplay of these concepts with America's unconditional recognition of so-called dual citizenship. It concludes that the latter significantly waters down our notions of what it means to be a U.S. "citizen", especially when it comes to the constitutional requirement for eligibility to be our nation's President. As Abraham Lincoln put it, "A house divided against itself cannot stand".