Consider this as well. If U1 were somehow married to the Russian election interference investigation, the evidence (if leaked effectively) would force RR to recuse which would then force Mueller to do the same. They were both involved in U1.
Therefore, with RR, Mueller, and Sessions out, the Associate AG would have to appoint a new SP to continue. That would be Rachel Brand of Iowa, sworn in just 6 months ago.
Sessions IS NOT out!
PERIOD!!
That would be a great scenario, but the Swamp wouldn’t allow it.
People like Mueller do not recuse themselves.