I'm surprised all of them did not call themselves moderate. It's a weird research method to ask the journalists how they describe themselves. I'm sure if you ask that crazy Lou Dobbs he would call himself a moderate.
But I agree that most of the journalists are liberal. In fact most of the college educated people are liberal. I don't see what's wrong with that. If a media outlet has a competent management they can see right through bias. Mara Liasson contributes to Fox News while being a correspondent for NPR and nobody questions her professionalism.
There's also a question of outreach too. If media has a liberal bias, how come Fox News dominates cable news? Those 2 statements seem contradictory.