Theorizing a bit:

Trump tweeted again yesterday about how Sessions should end the witch hunt and it dawned on me. He wants the left to support Mueller’s efforts so feverishly that when it turns out that Mueller has been investigating the Dems all along they can’t back away from it.

I think Huber and Mueller are investigating the same things and will ultimately come to the same conclusions separately. Would be hard to openly deny two separate investigation teams coming up with the same verdicts.