Not just failures on this watch, but his personal failures. Clarke was the guy who was convinced that we should be concentrating all of our anti-terrorist preparations on our enemies' ability to conduct a "cyber war" against us. "Blood and guts" terrorism was too .....20th century for him to waste his time with. .....And he then convinced an equally idiotic Clinton that his position was sound.
So, if Clarke has a conscience at all, it must be pretty heavily weighted down with the deaths of 3000+ Americans hanging on it. And I suspect his "blame (Bush) game" is an attempt to relieve himself of that guilt. ......and to fill his wallet, of course.