What does it mean to be a “sovereign nation.” We talk of the Chickasaw Nation, for example, but how sovereign is it? This story explores the Oklahoma tribe’s foreign policy – it’s based on trade (gambling) with its largest neighbor, Texas. Their domestic policy boasts something that President Obama can’t – universal health care. And the piece examines how economic success has translated to a truer notion of independence and nationhood. Arun Rath reports.