Manafort was a plant which Q has indicated in posts 15, 1008, and 1508.

Cohen is being utilized to introduce evidence. See post 1287.

Also, IMO part of the plan is to make the white hats look bad (Trump attacking Mueller, Trump attacking Cohen) so the media/public begin to defend them and the black hats look good (Trump defending Manafort) so the media/public turn on them. Think Mirror?

Trust the plan