He already stated what he will do.
Furthermore, perhaps you libtards finally understand that a sitting President CANNOT be indicted after all of you argued otherwise. How many fake news articles did the libtards on the board post stating the opposite? All of you were 100% wrong. Idiots.
That was the decision of one man interpreting policy. Another could've disobeyed such policy.
As to Mueller appearing before congress, he could sit there and answer questions by reading the report for all I care, I doubt he'd disobey a subpoena.