Glen Beck did do that. He did a good job of summarizing the information and making it easy to follow.
The Front Page Magazine in its Discover the Networks did a very good job identifying the leftist networks. PJ O'Rourke in his book The New Enemies List also identified and exposed many leftists. Others have also done a good job documenting the Communist networks in the U.S.
Well stated and all very true, but my point was that no in such a high media position, with a popular national TV show on a major network, before or since, ever came close to doing the sorts of things he did. It was incredible how he pulled the curtain aside on all of these slime ball lefties and commies and outed them, their agenda, and their tactics, on a daily basis for MILLIONS to see. Most people hadn't the foggiest clue about any of that stuff. Many still don't, even here on FR, as evidenced by numerous comments we see posted here.
I don't know of anyone else exposing Communist infiltration on TV.
Patriots have a very tough time making it onto TV. It seems only liberals are given access to televisions large audience. That one reason why there is conservative talk radio.
I think Glenn Beck lost his Fox TV show not because of ratings but because he was exposing leftists, such as Soros, who are trying to destroy America.