What led to kansas becoming a location of contentious slavery and anti-slavery battle?

The state of Kansas was in a conflict during 1854. This conflict was full of series of violent actions and political confrontations between anti-slavery and pro-slavery. This conflict was called Bleeding Kansas. The main question of this "war" was to whether allow or outlaw slavery from the state.

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.