Really? You state thats as a fact. What are the "goods" and who are the Senators involved?
I will see if I can find articles where Miranda himself refers to memos the rats have.
Paul Weyrich, chairman of the Free Congress Foundation and often spoken of as the conservative conscience of the GOP, tells Insight that Senate Judiciary Committee Republicans might fear revealing the outrageous Democratic memoranda lest their own memos come under scrutiny.
This is the only one I could find in a hurry, but I have seen articles where Miranda himself says the GOP fears exposure of their own memos.