The U.S. Supreme Court has ruled that former US President Donald Trump cannot be prosecuted for actions that were within his constitutional powers as president in a landmark decision recognising for the first time any form of presidential immunity from prosecution. To get an understanding of what this ruling entails, Lester Kiewit speaks to Prof. henry Brady, the Dean of the Goldman School of Public Policy and Class of 1941 Monroe Deutsch Professor of Political Science and Public Policy at the University of California, Berkeley.