And now we can pretty much surmise that when The Joe threatened to withhold $1 billion in aid, he was not trying to protect Hunter - he was trying to avert discovery of his $5 million Judas money!
So it was Burisma all along and we don't have to take @repMTG 's word for it. We have the evidence.
On Nov 2, 2015, the director of Burisma's board wrote Hunter demanding "deliverables", specifically to get "high-ranking US officials" to "close down" the cases against Burisma.