Mueller first has to find if there was a "Russian campaign" of any sort. So far the only "orchestration" is from partisan congressional members and government officials that either:
a) Want to discredit Trump and/or deflect from the real reasons for the DNC loss.
b) Want to continue to demonize Russia for not supporting the US global agenda.

Given that some of the initial key members of Mueller's team have left for other cases and projects, it is looking more and more that at least some team members have concluded it is better not to have this witch hunt on their resumes.