Sessions might have to be a witness, and this could be what we are seeing. He would have to step down. He was living and working down there where Hillary and Bill buried some bodies so to speak. He has stayed in the background, silently wiping out MS13, and finding the children who are being trafficked, while Trump kept the media busy with "Russia Russia" and numerous outrageous tweets.
Look there, look here, the truth is behind you" (where you are not looking)
Trump and Sessions have successfully extracted the children from basements, tunnels, and other places. They have the highest record of rescued children of any administration to date.
If they had drawn media attention to this hunt for the kids, the criminals would have put the kids in barrels of acid to get rid of the evidence. I suspect that is what happened at that hotel in Shiffs district, remember/ All those 55 gallons of acid that were dumped down the drains at the hotel? Hotel claiming they were "just using the acid to clean the place?"
It appears we are going to have another shift of "attention". Sessions may have to be a witness in future cases. A witness can not serve in a power position over the investigation or prosecution of these kinds of crimes, as the captured sex traffickers have been turning states evidence on those at the top, and those at the top will be well known public figures.
This is what I am suspecting. (hoping)
They must feel that they have located and rescued as many children as they can to start this next stage.