But your opponent is correct. Manafort indictment is about laundering money he made in Ukraine before 2014. It really has nothing to do with him being a campaign manager in 2016. Moreover, I bet this activities as a campaign manager were examined under microscope, and nothing shady was found, otherwise he would be indicted.
Both of those are specific legal definitions. Could you please elaborate on what your point is?
We can only speculate, but if you lie to the FBI, I would assume it's very likely that you have something to hide. Whether those plea deals led further down the rabbit hole to people who were guilty of further crimes we don't know. Maybe a few of them were on that list. Maybe some will get revealed later. I'm hopeful we will uncover the truth in time.
Lets stay rational and stick to facts.