When was the news ever "Who, What, When, Where, Why?"
It's always had a slant as long as I remember. Here's "the most trusted man in America" calling ror the U.S. to get out of Vietnam:
https://www.youtube.com/watch?v=Dn2RjahTi3M
What is that if not a partisan political opinion?
The news has always chosen what and what not to report. Just deciding what is and isn't newsworthy is a political decision. Heck, my conservative friend used to read the Wall Street Journal. I'm talking when we were kids (10-12) I'd argue with him about whether Reagan was a good president. I thought even then he had a highly colored view of reality and I'm sure he thought the same of me.
BTW, I don't think the problem is the press. I think it's a lack of open-mindedness, critical thinking, and healthy skepticism. We get what we deserve by not educating our kids better about how to consume information and consider view points outside their own worldview.