Malignant narcissist is the technobabble phrase for "EVIL", which is just too inflammatory for the scientific world.
The truth is, a malignant narcissist is evil, and the Clintons are the embodiment of this trait so helpful to the political ambitions of 'Rats in the opinion of many.
Never negotiate with evil.
Why doesn't Michael Moore make a documentary about this? I know why. It seems some enterprising film maker would jump on this. Then again, his or her life may not be worth a plug nickle.