if Manafort isn't pardoned, I would guess this is why (though who knows, really)https://twitter.com/MikeMadden/status/1032342426080501761 …
There is precedent for pardoning patterns of behaviour rather than concrete crimes, e.g. the pardoning of the "draft dodgers". So to my non-lawyerly eyes it looks like the pardon could be made out to be to for all contempt arising out of non-answering in the investigation.