Mackinac Island, Michigan is forced to secede from the U.S. and become an independent nation, thanks to a little-known clause in a 200-year-old peace treaty between the British and Americans. The clause is re-discovered two weeks before July 1, 2015, the day Separation will take effect. And because this treaty has dictated our relationship with England for the last 200 years, it must be honored: Mackinac Island must separate. Of course, Congress can't...