"White House Domestic Policy Chief John Ehrlichman wrote that when he served as the White House Legal Counsel, Nixon ordered him to request that the CIA hand over all documents pertaining to John Kennedy's murder. Nixon was furious when Richard Helms, the CIA Director, refused his presidential order to hand them over.
This stunning new Watergate-era tape captures an increasingly besieged Nixon desperately seeking to mobilize the CIA in his defense by threatening to expose their greatest secrets."