Why is mccain not in there?
Because the Dossier was used to dupe the FISA court long before McCain was given the dossier and passed it to the FBI.
I suspect that giving the dossier to the gullible McCain, known to dislike Trump, was the “insurance policy” so he would be blamed, not the Hillary campaign, and they figured if anyone tried to trace the chain of custody and got sidetracked to McCain by all the media finger-pointing, that would be as far as any investigation would go.