Define sovereign and hierarchical

MEANING OF SOVEREIGN It often describes a person who has supreme power or authority, such as a king or queen. ... Nations and states are also sometimes described as "sovereign." This means that they have power over themselves; their government is under their own control, rather than under the control of an outside authority.MEANING OF HIERARCHICAL If something is hierarchical it has clear levels of power and importance, such as a hierarchical corporation that has the boss at the top, or the hierarchical social order of junior high school popularity.

United states v.  nixon, 418  u.s.  683 (1974),  was  a landmark  united states supreme court case  that resulted in a unanimous  decision  against president richard  nixon, ordering him to deliver tape recordings  and  other subpoenaed materials to a  federal  district  court.