"Who could have imagined that he would be that stupid and character flawed?"
You could infer from this that:
a) Rudy is already on the short list for 2008
b) Rudy personally vouched for Kerik...thus shortcircuiting the normal upfront screening.
c) Kerik is street smart tough, a bit of a hustler, and in way over his head politically.
Kerik was the right man for the job, but alas, this system screens out the best. Come on, what does hiring an illegal alien have to do with a person's character? What Kerik went through during his childhood and and his achievements in later years far outweighs this minor "character flaw". He is one of a kind and this is our loss.