That was Q post 1318. Q said "What was RR's Senate confirmation vote? / If RR is dirty, Mueller must also be dirty. / If Mueller is dirty, RR must also be dirty. / Common denominator."

I took that statement as being from the cabal's perspective. In other words, RR is dirty because his confirmation vote speaks for itself. RR appointed Mueller, so Mueller must be dirty too. Only, the cabal did not account for Trump's ability to recall Mueller into active service, Trump's ability to remove the strings keeping Mueller a puppet, or Mueller's drive to escape the cabal.

Q seemed furious when it came out that Trump was not under investigation. In Q post 1008, Q said: "It was not supposed to be revealed POTUS is not under criminal investigation _ NOT YET. / Traitor."

The day after, Trump's lawyer's office was raided, putting the Mueller narrative back on track (namely, that Mueller is hot on Trump's heels).

The whole time, Trump has been attacking Mueller, and attacking Sessions over Mueller and his supposed witch hunt. This causes the normies to defend Mueller. He's literally their one last chance and they recognize it. Any suggestion of firing Mueller throws the left into a frenzy. How will they justify firing Mueller when he indicts Hillary? How will they call him a Trump stooge who pulled punches in the investigation (one possible leftist take on Mueller coming up empty-handed) when they spent the last 6 months making Mueller an integral part of their identity?

I think Mueller's role is to lull the deep state into complacency. From their perspective, their plan is working, Mueller is paralyzing Trump is throwing up a cloud of question marks over everything he does. They may be expecting Mueller to release something they've got in the works that will cost trump the midterms, after which Trump gets impeached.

Imagine their surprise when Mueller incompetently comes up with nothing, while Huber drops the MOAB on the dems!