holy crap, this is remarkable.
As it relates to FISA warrants and 702 wiretaps/incidental recordings in the course of surveillance of foreigners abroad, check out this amazing C-SPAN 7 min exchange from Lindsey Graham in a Senate hearing. Pay particular attention to what he's focused on starting at about the 3:30 mark:
This happened in July 2017. Lindsey's abrupt flip to become a servile Trump bootlick happened a few months later in Oct. 2017. It sure sounds like Lindsey is using himself personally as an example because he knows he is vulnerable based on certain conversations he's had, and which he does not want to be accessed and used against him for political damage/blackmail. Based on what happened weeks later in Oct, it appears the political blackmail he's concerned about is came true, and ironically it likely came from within - Trump/WH.
It would be a next level set-up, but it's conceivable Graham spoke with Kislyak or some other Russian official acting as an agent in the 2016 election scheme and was set up by said Russian who may have broached verboten topics on the phone. Conceivably, even if Graham was not a party to active participation, even a conversation where he is made aware of criminal conspiracy and failed to report or act could end his career. Additionally, it would be expected that the Russians would have this on tape. Perhaps it would give Lindsey comfort to know Russians had it and not our IC where he could be unmasked.
Either way, in hindsight today, Graham's demeanor and line of questioning in the C-SPAN clip is extraordinary. The govt officials trying to answer his questions have to be feeling in their gut that Lindsey is in reality revealing concern about himself personally. Lindsey wants personal assurance, and it's cringeworthy.