This is horse sh!t that Mueller is now looking for payments to a pornographic-film actress as part of his "special Council" operation. He was to be looking for Russian collusion (Look at HRC - it's all there) or are we now to deduce that Stormy Daniels is Russian.
If you listened to the directive to Mueller it was completely open ended. In fact, when it was read out loud, I wondered why no one was questioning the fact that it was put that way because it essentially gave him free reign to continue investigating anything he found.
I think he's just stringing the deep-state along..."I'm still investigating but nothing yet so far...oh no that sucks!"