Supreme Court Justice Antonin Scalia spoke with NPR on Tuesday at the Supreme Court in Washington, D.C. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR

Justice Antonin Scalia testifies before the Senate Judiciary Committee on Oct. 5, 2011. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images

The U.S. Supreme Court took on a number of high-profile cases this term, including the decision to uphold the Affordable Care Act. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Judge Richard Posner of the 7th U.S. Circuit Court of Appeals in Chicago. John Gress/Reuters /Landov hide caption

itoggle caption John Gress/Reuters /Landov

Since the Supreme Court's health care ruling, there's been a lot of speculation about whether Chief Justice John Roberts changed his mind during the course of deliberations. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

This artist's rendering shows Chief Justice John Roberts (center) speaking at the Supreme Court on Thursday. From left are Justices Sonia Sotomayor, Stephen Breyer, Clarence Thomas, Antonin Scalia, Roberts, Anthony Kennedy, Ruth Bader Ginsburg, Samuel Alito and Elena Kagan. The court voted 5-4 to uphold President Obama's health care law. Dana Verkouteren/AP hide caption

itoggle caption Dana Verkouteren/AP