Robert Stacy McCain is on to something here:
One of the reasons why there are so few conservatives in America's newsrooms is because the profession of journalism is relentlessly derided by those who claim to speak for the conservative cause. No kid who grew up listening to talk radio could possibly believe that becoming a reporter is a worthy ambition. (To be a talking-head pundit on cable TV, yes; to be a mere reporter, no.) ...
There are indeed such things as conservative journalists, but it is a corollary of the anti-journalism worldview of Republicans that conservative journalists are judged not by their skill -- the accuracy of their reporting, the readability of their prose, etc. -- but by how useful they are in the service of advancing GOP political objectives. Republicans treat conservative journalists with a special disdain, as mere errand boys or stenographers whose job it is to spread the GOP message.