The National Security Institute and the Federalist Society held a debate on the President’s legal authority to declare a national emergency on the southern border. As legal challenges to this declaration work their way through the courts, watch the potential arguments deployed by each side below. NSI Visiting Fellow and former Associate Deputy General Counsel at the U.S. Department of Defense Adam Pearlman moderated the debate between Antonin Scalia Law School Professor of Law Michael Krauss and the Cato Institute’s Ilya Shapiro.