Let me give you one example of how intelligence intercepts were used to target specific individuals. Ask yourself, , “how did George Papadopoulos get on the radar?” Papadopoulos was living in London and communicating with Corey Lewandowski, Trump’s campaign manager at the time. Those communications were intercepted by the UK’s GCHQ and passed, through liaison channels, to the NSA. That information was used in turn by the CIA and the FBI, working with British Intelligence, to ensnare Papadopoulos. He was offered a job, for example, at a firm tied to British Intelligence and subsequently introduced to Joseph Mifsud.
I believe Donald Trump is holding trump cards that irrefutably show that the CIA, the FBI and DOD were communicating in Top Secret channels about these activities and that the coordination also included foreign intelligence personnel in at least the UK and Australia.
I hope this helps you understand the desperation of the U.S. national security agencies to keep this stuff hidden. The revelations, if they come, will be devastating.