There is no "due process" associated with FISA. FISA is a spy vs spy activity. The FISA court exists to launder evidence just in case a spy is criminally charged. Even then, FISA evidence is rarely (I'd say never, but there is i think one exception) used in criminal trials, and if it is, the warrant, etc. is hidden from the defendant on grounds of national security, protecting sources and methods, etc.
The government is dirty as sin.
Inch by inch we the people have accepted their dirt. Finally we have a leader who will stand up.
WWG1WGA
If this plays out right, maybe we can get back towards the constitutional protections that we once had. I mean, if that’s even possible any more with a hot war.