We're in BIG trouble cause some morons who voted for Hope and Change are willing to drool over one hand investigating Bush while the other goes ten steps further to erode the constitution.
As to the original question:
Why would these people refuse to be questioned? Couldn't be they did anything illegal could it?
Maybe they had better things to do than let someone go on a fishing expedition into their past. Scooter Libby can probably relate to that. 200 people interviewed and the story is 6 didn't interview. Guess they didn't get a whole hell of alot out of the other 200 or that might have been the story.