The home page for the Rasmussen report shows that there are 16% who are “not sure.” Which can be an honest answer, as network news is loosing viewership steadily. So the 61% you are worried about is actually around 45%. I agree, that’s not much of a consolation, but at least the contingent of those with their heads in the sand is below 50%.
If only 39 percent say there is a liberal bias, then ipso facto 61 percent don’t understand the most fundamental thing about the media, and that’s ignorant. Whether they say “not sure” or something else isn’t the main point. It’s still a discouraging stat, though it’s probably a little better than it used to be.