The “stunning†part to me:
Don't be too ready to completely buy Cline's tale of woe. One of his clients was Wen Ho Lee. There was a guy definitely guilty of mishandling classified materials, probably guilty of espionage, and questionably guilty of treason.
His case caused a lot of problems and embarrassment for the FBI. Some of that was from straight up ineptitude. Clinton even apologized for the treatment, which given the uncomfortably friendly relationship between Clinton and the Chinese, was absurd.
If there was a person who'd be frozen out and marginalized by the investigators, it'd be Cline. You can bet there are long standing grudges alive and well among senior people who've been around for awhile.
If you enjoy 'stunning' material, find an old copy of The China Threat by Bill Gertz. The damage to security permitted under that admin is appalling.