Supreme Court Justice Roger B. Taney - wrote what became regarded as the opinion for the Court on the Dred Scott case, holding that Congress had no authority to restrict the spread of slavery into federal territories. Dred Scott v. Sandford decision is considered to have indirectly been a cause of the Civil War. http://en.wikipedia.org/wiki/Roger_B._Taney
Roger Brooke Taney (March 17, 1777 – October 12, 1864) was the fifth Chief Justice of the United States, holding that office from 1836 until his death in 1864. He was the first Roman Catholic to hold that office or sit on the Supreme Court of the United States. He was also the eleventh United States Attorney General.