Stephen Krasner is an international relations professor at Stanford University and is the former Director of Policy Planning at the United States Department of State, a position he held from 2005 until April 2007 while on leave from Stanford. He is a senior fellow at Stanford University's Hoover Institution. Wikipedia*
On the C-SPAN Networks:
Stephen Krasner has one video in the C-SPAN Video Library; the first appearance was a 2009 Forum.