Professors Matt Adler, Joseph Blocher, and Ernie Young engage in a panel discussion with Christina Duffy Ponsa-Kraus, George Welwood Murray Professor of Legal History at Columbia Law School, exploring a range of constitutional issues-typically uncovered in the 1L curriculum-that arose in the decades following the Civil War and Reconstruction. Professor Ponsa-Kraus discusses some of the legal questions surrounding the status of Puerto Rico and other U.S. territories, including in particular the history and continuing relevance of the century-old Insular Cases.