Did these Presidents reply? Yes. Not so much Obama and Joe Biden as there is a rather embarrassing response from Joe Biden when he was Chairman of the Senate Judiciary Committee that people -- especially leadership of the Democratic Party-- would not want many many people to see.

And Obama would have a connection to the group of law librarians who blacklisted me through the University of Chicago Law School. I doubt if he knew much of anything about it in the period from 1991-2007 or thereabouts.