On April 20, 2015, the Supreme Court heard oral argument in Johnson v. United States. This case concerns two questions. The first is whether mere possession of a short-barreled shotgun should be treated as a violent felony under the Armed Career Criminal Act. The second question asks whether the residual clause in the Armed Career Criminal Act, which mandates that a minimum sentence of fifteen years be imposed upon someone who unlawfully possesses a firearm and has had three prior "violent felony" convictions--with the phrase “violent felony” including any crime that “involves conduct that presents a serious potential risk of physical injury to another”--is unconstitutionally vague. -- To discuss the case, we have Richard Myers who is the Henry Brandis Distinguished Professor of Law at the University of North Carolina School of Law.