Mad Man: Is Glenn Beck Bad for America
Time | Asking the tough questions...

Admittedly, this is a dated article from a source whose only recent contributions to journalism are accurately describing the easily observed.

However, it's a good summary of the man, and a great segue into what has to be one of the best satire websites ever built:

http://hasglennbeckdeniedrapingandmurderingayounggirlin1990.com/