They were working for her day and night. About two weeks before the election a woman on CNN mentioned that perhaps they had blindly been supportive of Clinton. Clinton tried to have her taken off the air. Every mainstream outlet besides Fox behaved so unprofessional, unjournalistic, and purely propaganda spewing in favor of Clinton that even Democrats were talking about it.
The media's job is to report news. They don't even have to be smart. Just report what happens. None of them seem to know that. It's not their job to give us the information we need to vote. That's the problem. That is how they attempt to persuade you to vote for their choice. News. That is their only job. And they FAIL miserably.
There is no excuse for CNN, NBC, MSNBC, ABC, and CBS. All of them!!! The local affiliates where I live did a fair job of just reporting where the candidates were and when debates and rallies would be. They showed polls. That is very different from what some of them do by just telling viewers what the polls said. We aren't stupid; just put the chart on the screen. Oh no, they prefer to interpret it for you.
I watched very llittle TV news for a year before the election. I set up one browser for web news reading; it would not play videos.
I seriously don't know how you can make this claim. The media even handed Clinton the question list before the debates and made sure Trump's mic equipment was half connected. They should all be in jail.