Here's a recently unearthed conversation between Richard Nixon and Nixon's Chief of Staff H.R Haldemann reacting to John Kerry's appearance on The Dick Cavett Show with Nixon supporter John O'Neill (later of Swift Vets for Truth).
Nixon: Nothing you can do about it, obviously?
Haldemann: We've complained bitterly about the Cavett show.
Nixon: Well, is there any way we can screw him [Cavett]? That's what I mean. There must be ways.
Haldemann: We've been trying to.
It has been reported that Cavett was fascinated by the discovery of this material. Rumors at the time were that an inordinate number of IRS audits of employees of the Cavett Show were related to White House efforts to intimidate the late-night talk show host.