They have continuously fed, watered and nurtured the monster, Trump is their creation, plain and simple.
They have given him billions in free publicity keeping Trump and his toxic message front and center in the American Peoples' consciousness which in turn tacitly if nothing else normalized Trump with too great a segment of the public.
They did it because the corporate media conglomerates were more afraid of a Bernie Sanders victory than an "establishment" Republican loser in the primaries.
They blacked out, demeaned, ignored or misrepresented Bernie and his message of unity, inclusiveness, great income disparity, mega-dollars corruption of government and campaign finance reform because Bernie's proposed policies were in conflict with the corporate media conglomerates' self serving interests on too many levels.
Had the CMCs given even half the attention to Bernie and his message that was doled out on Trump, Democratic turnout would be much greater than it has been giving the Republicans a run for their money in the primaries and Trump would also be weakened as a result.
Thanks for the thread, struggle4progress.