Trump did something wrong here - and he knew it, it was intentional seeing he had set this up. He withheld scheduled aid to Ukraine with intent. He recalled the ambassador from Ukraine who objected to Giuliani being sent to question the new premier. In his dialogue in the one
phone call we have seen he sets up a pay for play with Giuliani and Bill Barr. He's admitted to his perfect conversation
This is the second time he's solicited help from a foreign gov't to dirty another opponent in a US election - the first one got a pass from Mueller investigation - he doesn't get a second shot at performing the same trick.
All of this without discussing his other treasonous acts as in Helsinki and so on,.