Well, I would think his letter to the Russian leaders in 1983 offering to help them put together some propaganda that would look like it was generated in Russia - to help keep Reagan from being reelected = would lead to that conclusion.
Kennedy could never have dreamed - years before The Wall fell - that anything he wrote to Russia would even see the light of day in America = but, oh, my, it seems it has surfaced in KGB papers....
(Why he isn't under investigation for this is beyond me.)
When a drunken $inator can kill another person without serving time in jail, that was a loud and clear message to Teddy that with the MSM in his pocket, he could do anything from murder to treason.