Manafort likely was trying to use his association with candidate Trump, or Prez Trump to further his dealings in Eastern Europe.
Street smart DjT sensed Manafort's motivation, smelled trouble, and canned him.
Picture perfect insticts, imho.
Recall Manafort was involved only a few months and this in the campaign early on....there were a lot of doors opening and closing then. I suspected Trump would make errors since this was his first ever Pres.campaign. Heck plenty here were disputing over various choices he made in who he brought on board.
One of the tings I like about Trump is if he makes a mistake he corrects it and moves on. His followers, encouraged by msm, are the ones who keep wallowing long after. He’s stirring up dust and none of it is settled so he needs to be given time and room.