1) Why can't they reveal it to the House and Senate Committees?
2) Not admissible in court? What about closed-door sessions with said Committees?
3) Trump officials they own? This is mere surmise, on your part, with no concrete evidence to back it up.
4) Mueller's job is to attempt to prove that his buddy, Comey, is vindicated...period/end.
There is no collusion nor obstruction.