I am convinced that there is no way Mueller did not know about the FISA shenanigans going on when he took his gig. There are too many people with close ties to him who were perpetrating the whole thing. If he did know, that makes him a criminal. Mueller and his investigation need to be seriously investigated. What he knew and when he knew it are vital questions that need to be answered.
The FISA warrant for Carter Page was first in Oct. 2016, and had to be renewed every 90 days. Rosenstein was one of those who signed off on renewals, as was Comey, as was Yates as was a whole lot of people. In 90 day segments from that month, this would mean... Jan. 2017, March 2017 and.... MAY 2017 when Mueller was appointed by Rosenstein— one of the re-applied warrant signers.
This stinks, and Gowdy is threading needles to preserve his potential future relationship with fibbies if he wants to get a job as a federal prosecutor— imho. Selective vision.