Mueller doesn't have to say anything. All he has to do is verbalize his report.
The Dems have totally wussed out by not using the last month to destroy Jim Jordan for covering up dozens of sexual assaults of Ohio State wrestler while he was an assistant coach there. If they can't destroy this evil bastard, they may be too weak to attack and destroy Trump.
This Ohio State thing is being completely underreported. I was reading a complaint in one of the cases yesterday alleging dozens of male athletes were abused and the school was well aware of it. The facts really support the allegations. This is Michigan State except it was male athletes and the doctor is now dead.
That reads to me like Mueller wants to have a lawyer present as he testifies.