Never interrupt an opponent who is self-destructing. Every day the American voters see that the President is absolutely right when he calls the press "The enemy of the people."
By letting them run Hog-wild, (pun intended) "Fake News" is no longer a Trump buzz-line, it is permanently etched into the lexicon as a synonym for "mainstream media."
Guess this is why the left is trying to reclaim the phrase. It is SOOO effective, accurate, and now mainstream. They want to turn it backward— finger pointing anything that goes against or challenges their own propaganda.