Except that this isn't correct in the face of parallel construction. You can't fight the evidence at trial if it either isn't presented, or its origins are misrepresented by the prosecution, which is what parallel construction leads to. (You use the stuff from the NSA to find other stuff, and build a plausible story about how you found the other stuff. The illegal search is never presented in court, so you can't fight it; the other stuff is, but is should be fruit of the poisonous tree, if the full truth were told.)