Correct. Trump has slipped some in the polls, and yes, a chunk of that has been self-inflicted. But is he 15 behind Hillary? Not even close. I would be surprised if he is more than 2 behind her at most, and in all likelihood I think he is probably 2 points up on her even after a couple of bad weeks.
Its a long way until November. The media wants to sell a narrative HARD right now so that come October when they have to start releasing real polls instead of Potemkin polls, they hope the public has so bought into the lies that Trump really IS 15 points behind.
Even have some surrogates breakdown the crappy polling methodology (of the worst of them) and let it stain/taint all polling.