the world has seen. that we're heading toward a collision between bob mueller and the president of the united states. >> do tweets like today change your assessment of the president's fitness for office? >> my determination is to make sure that special counsel investigation which will uncover the truth about rush yoon meddling in our election, about potential trump campaign collusion with it. and the later allegations of obstruction of justice are fully uncovered. and the criminal charges are sought where appropriate. my opinions don't matter as much as what facts are. there are real facts here and special counsel has to uncover them. and his credibility and capacity to do this investigation are very much at stake. that's one of the reasons why we want to send a message to republicans for democrats that this kind of constitutional