Yep, there is something else at work here.
He also knows that government is not business. He's mentioned that a few times.
I won't Defend Trump attacking Sessions by the way. I think Trump could get similar ultimate effect without doing that. But I have to admit, there is all sorts of attention on the DoJ/FBI/Mueller relationship now, driven by the attack against Sessions. The spotlight is moving over in that direction.
"Scaramucci told Hewitt it was likely President Trump wants Attorney General Jeff Sessions to resign." TGP was source.
That's a clear shot across the bow, my assumption is Trump is building great sympathy for Sessions. MSM will soon be saying how great a guy he is.
That is when Sessions can either unrecuse or resign.