I have no brief for Manafort. A court will determined whether his consulting work was done in the US and is subject to US tax law or not.
I'm just concerned about equal justice, punishment fitting the crime, or alleged crime, etc. I also have a problem with prosecutions made with an eye on their political effect.
Then so far you should have nothing to be concerned about. He was properly indicted by a grand jury, the probable cause underlying the charges appears to have been vetted, and Mr. Manafort is on track to be tried in the normal course, just like anyone else charged with similar crimes.
The biggest difference here is that he ended up having bail revoked and is now back in prison. But that is his fault, not Mueller’s, because he attempted to tamper with witnesses. He isn’t in jail now as special political punishment, he’s in jail because he violated the terms of his bail.
And quite honestly, there would be more cause for concern if Mueller had said he was going to introduce evidence of collusion, because that would be nothing more than bad character evidence since it has no relevance to the crimes charged. Thus, Mueller’s statement, if anything, indicates that the prosecution is not politically motivated, rather than the contrary.