Ever heard of Roger B. Taney? He was the Chief Justice of the United States for almost 30 years, from 1836 to 1864. Today, he is remembered largely for one opinion he wrote, an opinion often considered the worst in U.S. Supreme Court history: Dred Scott v. Sandford. Recently, Taney's bust, displayed in his home town of Frederick, Maryland, was vandalized, and a number of people have called for its removal. Stewart talks with law professor Josh Blackman about this constitutional debate between present and past.