 depending on how you're looking at it. But the more I look at this, and I forget who it was that called this in months ago talking about this, that I had not heard of before, but Article 2, Section 1, Clause 3 of the U.S. Constitution, "...the electors shall meet in their respective states and vote by ballot for two persons of whom one at least shall not be an inhabitant of the same state with themselves."