By the work already done by the House intel committee, there is plenty of cause to charge many of the ObamaGate players, so president Trump could demand that Sessions and Rosenstein instruct Mueller to investigate ObamaGate (which relates to Russian collusion but by the DNC and Hillary) or be fired, for good cause, that they are so politically biased against Trump that they won’t investigate the biggest case of conspiratorial corruption in the history of the United States. Trump could do this quickly as fodder for the midterm elections, putting the corruption by Obama and Hillary front-and-center.