As one of the smallest Supreme Courts in the world, do nine justices fairly represent the diversity of views in the US? Host Claire Graham talks to the BBC's senior North American reporter Anthony Zurcher about how the ratio of republican to democratic judges has changed over time. The controversy over lifetime tenures of justices is discussed with no set term limits or mandatory retirement ages and we find out why historical court decisions are being overturned.
Produced by Cathy Young for the BBC World Service.