Er, um, no. FISA warrants and courts are different than regular warrants and courts for a very good reason. Most of them are issued post de-facto and as mtgx and I have pointed out, are literally rubber stamped. ZERO were declined last year.

I'd love a citation for the last sentence of your post. I'll work on background info on FISA warrants. Like I said, wish I had my debate evidence I cut years ago. Rather ironically, it's actually remarkably hard to refind some of that evidence 10 years later. Google loves to emphasize more recent publications.

A FISA warrant is as much a warrant as an FBI agent wiping their ass on a piece of paper and calling it a National Security Letter makes it a "legal warrant". (Yes, field FBI agents can issue them, and they're issued in the tens of thousands every single year, AND a single letter can apply to a person, team, family, or entire workplace.)

You might call it "legal" in that a law passed by Congress with secret interpretations and special addenedums tells them they can... but yeah, I'm going to keep on calling FISA warrants and NSLs used on US Citizens what it is: unconstitutional and thus practically, illegal.