And most talk radio isn't news!
Most talk radio seems to be....well, let's just say talk programs that complain ad nauseum from their particular political bias, in eye-raising style. In other words, they don't have much hard news. Just a lot of bluster. The benefit of this is that you can learn quite a bit about certain segments of the American public by listening to these. Just, please, don't paint us all with those broad brushes. They're sensationalizing and don't really represent the views of most Americans, imho. So try to think of them as entertainment rather than a news source.
Unfortunately, here in America, we have to work hard to find out what's going on in the rest of the world. The internet seems to be the best place for that information.
While there are radio stations all across the country, most of them get their programming from a limited number of syndication services. So they will usually have a local news reporter and then switch to one of the bigger services for their national news. Some will have local talk but usually for limited hours as the programming will be predominately syndicated talk shows.