Trump immediately brought in Manifold.
Then he brought in the guy who so deftly ran Walker’s campaign.
He replaced Lebowski with two long time GOPe operatives.
Perhaps you are just not aware of what has been going on behind the scenes. It is hard to know everything going on behind the scenes in all the campaigns.
Seems to me that Trump did not throw Corey under the bus since Corey remains on the Trump Team and will also be a delegate to the Convention from NH. Corey has been rather busy besides having to deal with the ridiculous false claims against him. Nice to know the truth comes out in the end. :)