Mueller is playing chess five moves ahead while Trump is playing checkers, and badly at that too. Brilliant to let Trump answer his questions in writing and claim credit for them, knowing that Manafort's been telling the Trump team all the lies he told Mueller so they can "get their stories straight" AKA coordinated perjury.
Then, and only then Mueller parades out the evidence he has that proves Manafort lied. Now Trump has lied too, if he used Manafort's false claims! And not just lied, but lied to a Special Prosecutor during an official investigation. Unless Trump threw Manafort under the bus and denied his lies, he's screwed. And I'll eat my hat if Trump did that. I think he's a big fan of people "getting their stories straight".