In addition to Mueller laying out the groundwork for Congress to take over the disposition of obstruction of justice as an abuse of power by Donald Trump he also, get this, states in a footnote:
That the evidence of the Special Counsel Investigation be preserved so that once the sitting President leaves office, criminal indictments for obstruction of justice may be brought forward.
That the evidence of the Special Counsel Investigation be preserved so that once the sitting President leaves office, criminal indictments for obstruction of justice may be brought forward.