Interesting to note that the prosecutor was Patrick Fitzgerald, who put Scooter Libby in prison on false evidence. He's a buddy of Comey and Mueller, of course.
What's the appropriate sentence for trying to sell a seat in the US Senate to the highest bidder?
I think this is the real key to this action. Fitzgerald turned out to be dirty and he built his name on this prosecution. Beneath the surface, you may find that Blago gave up something for this. And, I think you are on the money about who may be the targets of this effort.