I guess I can only add that I have two friends/acquaintances that are/were fairly high up in the journalistic trade. One worked for a major metropolitan newspaper and one still works our govt funded news organization. They are both hard core lefties in their personal mails and when I express my countervailing opinion they think I'm a right wing kook. And these folks are the ones in charge of two of our major media outlets. I can only assume they are fairly typical of their brethren.
In another professional life I worked regularly with a lot of journos. Some remain good friends to this day, but we do have to be tolerant and even indulgent about our differing political views, otherwise we'd not be friends.
I'd guess that 80 to 90 percent of the many dozens I knew (or know) are on the center to far left of the political spectrum.
Again it's interesting that the UPI reporter didn't find a "news hook" while standing inside the best combat field hospital in the world. Because during my time in Iraq, Stars & Stripes ran several stories about the Balad operation, and I always thought those were among the best stories they ever produced (a lot of Stars & Stripes Iraq is warmed-over wire copy).