Per Claude Taylor, Mueller will be interviewing Joe Scarborough.

[The Velveteen Ocelot]

3. A WaPo editorial by Jennifer Rubin just came out, wondering whether

Mueller might want to interview Joe & Mika. She asked: "Do the allegations that the White House threatened two journalists with a potentially damaging story rise to the level of blackmail or extortion? That’s something for special prosecutor Robert S. Mueller III to consider. But if there is a paper trail — as there was in Comey’s case — the plot thickens." https://www.washingtonpost.com/blogs/right-turn/wp/2017/06/30/does-robert-mueller-need-to-pay-mika-and-joe-a-visit/?utm_term=.0f2657dbf0fd

So, once again, speculation turns into "fact."