NEW: Would FISA app have been authorized w/out the dossier? @TGowdySC says "No. It would not have been" MORE on @FaceTheNation soon. pic.twitter.com/kEmQFzRojm

— Face The Nation (@FaceTheNation) February 4, 2018

You need far more to get a FISA warrant, so lying about any part of it would have impaired it.