I do think that there is a letter from Kennedy asking for a subpoena for the private documents of William Rusher from the Library of Congress.
Really? You seem to have inside information. Please share with us precisely WHY you believe this.
I just did a search at loc.gov on William Rusher and got 12 lines of all kinds of stuff by a William A. Rusher. Is this the guy they are refering to? The Search type I used was "Keyword*".
One of the titles is "Rise of the Right"
another is: "Making of the New Majority Party"
and: "Ambiguous legacy of the Enlightenment"
Two entitled: "How to win arguments"