The FBI was using their access to the NSA metadata of all Americans,
to conduct surveillance on political candidates that might be a threat to the power structures that exploited the secrets within the electronic records of all Americans.
https://theconservativetreehouse.com/wp-content/uploads/2019/01/fisa-abuse-contractors-v2.jpg
The FBI was, almost certainly still is,
conducting domestic surveillance and tracking Americans just like the German Stasi or Soviet KGB.
It’s still happening,
but we are not supposed to talk about it,
or something.