I know that well. However, I'm not talking about radio in general, I'm talking about two very specific programs, Morning Edition and All Things Considered. If you spend morning drive time listening to Morning Edition, then read the headlines of the day's top stories on other media, you'll notice that the stories Morning Edition left out "for lack of time" were almost always the stories that were good news from the conservative perspective, but bad news from the liberal perspective.
It would take a book, or at least a much more lengthy post to cover all the details. But this is a radio discussion forum, where posts aren't as long or in-depth as newspaper articles or internet news sites. Radio discussion forums are based on shorter posts. You should know that.