I wouldn’t trust Q’s advice. There is no evidence that Sessions is doing anything!
And yeah, I know there are those who say he’s working like a dervish behind the scenes, but I simply don’t think so.
Witnesses in federal grand juries are not bound to secrecy the way other GJ participants are. GJ investigations of high-profile politicos always become known. If the DOJ is going after high-profile Dems, it’s not via grand juries currently.