“I’m wondering if Sessions could unrecuse himself since he’s already testified.”.......
Yes, recusals are voluntary & revocable.
At this point, it would be nice if he "unrecused" himself. Mueller is setting up a beyond bizarre fishing expedition and seems to be avoiding anything that touches on the misdeeds of the Obama administration.
I wish President Trump would think this through. I can't imagine who he could get confirmed that we could trust. And without an AG, the swampthings are running that swamp.