Trump is right that the media is generally quite destructive to America's well-being.  Say anything often enough and it becomes true.  The media has the power to repeat nonsense indefinitely.  Remember that evil Assad was behind all bad things in Syria and the rebels were freedom fighters?  Yeah right.  Turns out that the ISIS crowd is not about freedom and it would have been better for the US to back Assad rather than the "freedom fighters" now know in the same media as ISIS/ISIL whatever.