If the dossier is the key piece of evidence driving this whole investigation, and Cohen has never been to Prague, then the entire collusion trap and everything associated with it needs to be thrown out. This includes Manafort, Flynn, Poppawhatever and Cohen.
This also means that as a counter intelligence operation, it failed miserably.
I’d be extremely surprised if Lanny Clinton Davis said anything or allowed his client to say anything that doesn’t help the interests of the Dhimmicrap Party. He’s even sleazier and more corrupt than Herr Mueller.