#6 - Because the only election coverage the MSM knows is the horse race. When Hillary was way up, they wouldn't talk about policy, because she has articulated policies for pretty much every aspect of the economy, student debt, health care foreign policy, etc, while Drumpf has only the Bush economy on steroids and WALLLLLLLL.
So in an effort to get to the horse race, the MSM came up with the "both sides do it" crap, where they spent a lot of time reporting on non-stories because they looked bad (Benghazi, email, CGI), while ignoring real criminal activity in the Drumpf Foundation and every other aspect of Drumpf's crooked career as a charlatan, bilking unsuspecting people out of their hard earned money. This has been going on since the primary. A Hillary blowout doesn't sell papers, drive ratings or generate clicks.
So the MSM got what they wanted, it's close, and Drumpf, with his Birther Bonanza dog and pony show BS has pissed off the media, so they are finally looking under Drumpf's rocks. Sadly it's too late for many who believe the liable and slander foisted on HRC over the past 30 years, but hopefully her far superior fund raising and ground game will more than surprise the rubes come election day because as Bernie found out, no matter how big the rallys are, you still have to get your voters to the polls.