Karl Rove: Defending Bush's Immigration Policybr The Aspen Institute - Aspen Institutebr Karl Rove in conversation with Walter Isaacson at the 2007 Aspen Ideas Festival.In this, its third year, Aspen Ideas Festival once again gathers scientists, artists, politicians, historians, educators, activists, and other great thinkers around some of the most important and fascinating ideas of our time. As these thinkers present their provocative ideas, they engage a sophisticated and highly motivated audience.