I think that one of the worst effects of the Trump candidacy is that he's given a perverse legitimacy to the filth of the alt-right, to white supremacist movements and to a wide range of racial, ethnic and religious bigotry.  This ugly manifestation of hatred and bigotry has something of a life of its own: the haters and bigots will turn on Trump in  a heartbeat if they think he is retreating from the racism and fascism on which he built his campaign.  The appointment of Steve Bannon as Chief Strategist and Senior Counselor is Trump's guarantee to his base that he is fully committed to the racism and fascism that attracted them in the first place.