"I wouldn't have signed the FISA warrant" said Rod Rosenstein at today's Senate hearing. As to the obvious follow up question "what is it you know now, that you didn't know then", the answer in so many words was "that the FBI had lied to me". Of course Rosenstein didn't have the balls to say McCabe lied to him, he said McCabe "failed to inform him". That's what you do when you don't want to lie I guess.
Rosenstein also admitted that he never fully read the warrant before he signed it, he "reviewed" it and signed it. I guess you say reviewed when you can't admit you didn't read the warrant but his excuse was again "I believed the FBI". Yeah, seems like there was a lot of that going on.
I believe the FBI when they asked if interviewing Flynn was to "get him to lie so we can prosecute him or get him fired". That I believe.
How Comey and McCabe could possibly avoid prosecution for this I do not know.