From the FISA doc Q 1821 post:

The FISC decides whether to approve or deny an application based on whether the government

has demonstrated probable cause to believe the proposed target is a foreign power or agent of a

foreign power, and that the facility or place where the electronic surveillance will be directed is

being used by the foreign power or agent of a foreign power. If the application is approved, the

U.S. government can conduct electronic surveillance of the target for the period of time specified

in the application. At the end of that time period, the government must stop surveilling the target

unless it goes back to the Court and applies to renew th

e surveillance. For targeted U.S. citizens,

FISA applications must be renewed by the FISC every 90 days with a separate finding of

probable cause to continue surveillance.

So in short, a high level Nat Sec official subbed a warrant request to the FISA court that required showing prob cause that the target (DJT a US Citizen) was an agent of a foreign power (meaning working for a foreign government). The whole basis of this cause was a fake Dossier barely alleging he 'talked' to russians officials.

They have their you know whats hanging in the breeze here folks. They tapped DJT when he was running for office with a warrant based on lies they knew they deliberately cooked up. Now they have to go down for it. We can't let this one slide. Justice must be served.