I'd agree with taurath that if bias is there it's in the story framing or selection. And also sometimes interviewee: the various shows seem to like "Here's an archetype (e.g. soldier) who you would expect to be conservative, but actually has liberal views."

If you summarize every story, you end up with a lot more "affirming a liberal view of the world" ones than "affirming a conservative view."

That said, I still believe the content of the stories presented hews far closer to objective fact and truth than what I've seen from conservative media. So I wouldn't say it's nearly that biased.