By way of concluding this round-up, I'll address two decisions that themselves addressed the relationship between the United States and its territory, the Commonwealth of Puerto Rico. I'll also finish my discussion (begun earlier this year, well before this 'round-up series) of a controversy over US policy on the Mexican border and on the deportation of undocumented Mexicans in the U.S. Further, I'll say something about the ability of Indian tribes to maintain their own reservation-based courts, which courts can hear at least some controversies involving persons who are not residents thereof. All these controversies speak in their various ways to the idea of sovereignty, which underlies not only the US constitution, but any nation state's constitution, written or implicit. Tribes and Reservations Reservations are the sovereign territory of the recognized tribe. Obviously the Choctaws are not sovereign in quite the full-throated sense in which the United...