Yes, I think that's the core of the "witness tampering" aspect southpaw mentioned there.
Ford pardoned Nixon for any crime he committed or may have taken part in during his Presidency. Trump could issue pardons faster than new charges or orders of contempt could be drawn up, and I see no reason he couldn't issue a blanket pardon for Manafort extending into the future if the legal logic of Nixon's pardon is sound.
e: if he really wanted to, he could always pardon him, bring him on AF1, and fly him to a country without an extradition treaty. yeah, sure, it's completely absurd, but Trump's already pardoned two other political hack idiots, plus the guys who sparked off the whole Malhuer occupation, so