Matthew W. Barzun
Matthew Winthrop Barzun is the former United States Ambassador to the United Kingdom. He is a business executive who is known for his work with CNET Networks and for his volunteer work on Barack Obama's 2008 presidential campaign. Wikipedia*
On the C-SPAN Networks:
Matthew W. Barzun has one video in the C-SPAN Video Library; the first appearance was a 2013 Senate Committee.