The presidential primary results from Pennsylvania with Dr. Ron Walters, Professor of Political Science at the University of Maryland. Then David Bacon, labor correspondent provides a round up of International Workers’ Day, May Day events. In the second hour Gene Healy, author and senior editor at the Cato Institute, discusses his most recent book, "The Cult of the Presidency: America’s Dangerous Devotion to Executive Power". Wrapping up the program, Aimee Allison talks with Misha Glenny about "McMafia: A Journey Through the Global Criminal Underground".