Journalistic bias has traditionally been a matter of groupthink. "For decades liberal media elites were able to define current debates by all kicking in the same direction, like the Rockettes," as the Wall Street Journal put it in a 2004 editorial. In an age of media diversity, they can no longer reliably do this. Perhaps as a result, some liberal journalists have resorted to out-and-out conspiracy -- not that it's been effective.
Over the summer the Daily Caller, Tucker Carlson's new online magazine, obtained a tranche of messages from Journolist, a defunct, ideologically exclusive (no conservatives allowed) e-mail list that included academics, bloggers, and think-tankers as well as reporters and left-liberal commentators. Journolist, run by Ezra Klein, a young blogger at the Washington Post, had some 400 members, and the Caller's series of reports provided an often hilarious though occasionally disturbing look into the media hive.