wiki might be a better bet for non partisan response, but I will try.
here is the first part of what they say
Glenn Lee Beck (born February 10, 1964) is an American radio and television host, conservative political commentator, author, and entrepreneur. He hosts The Glenn Beck Program, a nationally syndicated talk-radio show that airs throughout the United States on Premiere Radio Networks. Beck also hosts a self-titled television show on Fox News Channel.
(even their site has people disputing about him...)