obstruction of justice. is that correct? >> that is correct. >> was there sufficient evidence to convict president trump or anyone else with obstruction of justice? >> we did not make that calculation. >> how could you not have made the calculation -- >> because the olc opinion, office of legal counsel, indicates that we cannot indict a sitting president. >> could you charge the president with a crime after he left office? >> yes. >> you believe that he committed -- you could charge the president of the united states with obstruction of justice after he left office? >> yes. >> mueller continued his testimony before the intelligence committee, where the focus was his findings about russia's efforts to meddle in our 2016 presidential election. as that hearing got under way the chairman made a point of refuting trump's attacks on mueller and his conclusions. >> when donald trump called your investigation a witch hunt, that was also false, was it not? >> i'd like to think so. yes. >> well, your investigation is not a witch hunt, is it? >> it is not a witch hunt.