I doubt you will. I think some of this comes from a couple of studies that were reported in the last 4 or 5 years.
First, a survey of journalists conducted by the Indiana University. In the most recent survey, conducted in 2013, 7.1% percent of respondents identified as Republican; compared with 28.1% that identified as Democrat. Both were the lowest percentages reported in the 5 surveys that had been conducted. Slightly more than half (50.2%) identified as independent and 14.6% as other; both the highest of the 5 surveys.
Just 7 percent of journalists are Republicans. That’s far fewer than even a decade ago
Another survey, Faculty Voter Registration in Economics, History, Journalism, Law, and Psychology published in Econ Journal Watch investigated the voter registration of faculty in the Economics, History, Journalism/Communications, Law, and Psychology departments at 40 universities. The abstract states that 7243 individuals were investigated, with party registration found for 3577 (3623 Democratic and 314 Repbulican). The results showed an overall Democratic:Republican faculty registration of 11.5:1.