Every twist of the investigation shows that Mueller knows far more than we thought he did:
Cohen’s plea deal shows he has phone records (hence the 20-minute telephone call to Moscow).
The aborted Jerome Corsi plea agreement shows Mueller has a host of emails.
The fact that Mueller knows Paul Manafort was lying to him likely indicates heretofore unseen corroborating witnesses, documents, and more
Be smart: There’s a lot more behind the curtain.