Mark Block is an American political strategist who served as Chief of Staff, & Campaign Manager for the 2012 Republican presidential campaign for Herman Cain. Block has previously worked for Americans for Prosperity. Wikipedia*
On the C-SPAN Networks:
Mark Block has two videos in the C-SPAN Video Library; the first appearance was a 2010 Forum as a Director. The year with the highest average number of views per program was 2011 with an average of 484 views per program.