Keith kept calling Beck that, and I was unfamiliar with the reference, so I looked it up - it's from the movie "A Face In The Crowd" starring Andy Griffith. We got it from Netflix (it was put out on DVD in 2006, with interviews with the major stars and Budd Schulberg, who wrote it (the director, Elia Kazan, had already died)).
Let me tell you, Olbermann's characterization is dead on. It's remarkable how appropriate it is... Here's the synopsis from Amazon.com:
Amazon.com Essentials: More timely now, perhaps, than when it was first released in 1957, Elia Kazan's overheated political melodrama explores the dangerous manipulative power of pop culture. It exposes the underside of Capra-corn populism, as exemplified in the optimistic fable of grassroots punditry Meet John Doe. In Kazan's account, scripted by Budd Schulberg, the common-man pontificator (Andy Griffith) is no Gary Cooper-style aw-shucks paragon. Promoted to national fame as a folksy TV idol by radio producer Patricia Neal, Griffith's Larry "Lonesome" Rhodes turns out to be a megalomaniacal rat bastard. The film turns apocalyptic as Rhodes exploits his power to sway the masses, helping to elect a reactionary presidential candidate. The parodies of television commercials and opinion polling were cutting edge in their day (Face in the Crowd was the Network of the Eisenhower era), and there are some startling, near-documentary sequences shot on location in Arkansas. An extraordinary supporting cast (led by Walter Matthau and Lee Remick) helps keep the energy level high, even when the satire turns shrill and unpersuasive in the final reel. There's an interesting parallel in Tim Robbins's snide pseudodocumentary Bob Roberts: both these pictures have almost as much contempt for the lemmings in the audience as for the manipulative monsters who herd them over the cliff. --David Chute
We can only hope for the same ending for Beck