On the C-SPAN Networks:
Mark Clack is a Deputy Director for the Public Campaign with three videos in the C-SPAN Video Library; the first appearance was a 2004 Forum. The year with the highest average number of views per program was 2005 with an average of 49 views per program. Most appearances with Fred Wertheimer (2), Tom Fitton (2), Lawrence Noble (2). Most common tag: Ethics.