Not understanding what you’re asking.
FISC, if I’m not mistaken, doesn’t operate like SCOTUS, where you go in front of all of them. The judges are picked to serve on the court for a certain amount of time. They hear cases, supposedly, that only deal with threats against the US, counterintelligence/spying/terror related stuff. Information that can’t be allowed in the public record.
When a Asst US Attorney, with whatever federal agent seeking the warrants, goes before a federal judge asking for a warrant or court order for something, once signed, that paperwork is public record. In it, it will detail the probable cause, methods and techniques, all sorts of info that would be very, very helpful to the bad guys. Basically, gives them a set of instructions of how to avoid getting caught the next time.
FISC allowed them to get the warrants, court orders, wire tap authorizations, etc, without the info being public record and without revealing the methodologies of how the information was learned: wire taps, human intel, signal intel, etc.
To put it on the local level....person works in the local DAs office - they see a name and address the recognize as a friend or family member that they know deals drugs - they tip off their friend or family member - cops show up and they hit a dry hole
FISC prevents that, supposedly.
I was quoting you back to fun the one who said they were all R.