What you didn't see were breaking news alerts every 15 minutes about the incident that actually happened on a major network's program about the shooting story, therefore closely linked to the shooting story, filled with innuendo and outright fallacious allegations aimed at people of the opposite political persuasion than the victim.
Within minutes of the shooting, however, the media at large were doing just that, non-stop for 5 days, and some are still doing it even after the facts are known. Although one of the critically injured victims, Congresswoman Gabrielle Giffords, is a Democrat, one of those killed, Federal Judge John Roll, was a Republican. But conservatives were targeted because it wouldn't have fit the media's political agenda and playbook to assume, with absolutely no evidence, that the Judge was the intended target and to assign blame on the heated, and even vile, left-wing vitriol of at least the past decade.
I know that a death threat is less serious than an actual shooting, but I would bet my house that if the person doing the threatenting had been Humpries, the conservative, and Fuller, the liberal, had been the victim, there would have been more than just a passing mention in the news. They would have run with it for another 5 days as evidence that conservatives, particulary the tea party people, are dangerous and unhinged radicals, and would then have tried to tie it back into the shooting incident to bolster their unfounded allegations that the shooting really was the fault of their rhetoric (in reality, their peaceful demonstrations to voice their disagreement with the policies of the current administration).