Unfortunately, Goldberg is acting as social scientists when he comes to conclusions. A reporter is supposed to report teh news, not come to conclusions about bias. that requires a social scientist, no?
Let's look at your claim that Engberg is consistent in his liberal bias to see if Goldberg and you (by extension) are correct in that assessment. Please explain how these pieces by Engberg are liberal bias: (my comments in italics)
1. Engberg attacked Forbe's flat tax plan yet many conservatives attacked it as well (including Gingrich).
Why did Engberg display a liberal bias but Gingrich and other conservative flat tax critics did not?
2. Engberg did a "Check" trashing Hillary Clinton for Whitewater and the travel office firings.
Is this an example of Engberg's consistent liberal bias?
3. Engberg quote

4/6/95): They scoffed last fall when Newt Gingrich said a Republican House would slam-dunk the status quo…Time out! They did it. Politicians actually keeping a promise?
Is this an example of consistent liberal bias?
4. Engberg Quote (5/24/95) Fiscal fantasy number four is that a balanced budget cures all ills…It’s future generations that really benefit. But the fiscal discipline that might be imposed by the GOP plans could be a welcome step away from fiscal fantasyland. Eric Engberg, CBS News, Washington.
(hmm, Engberg says a welcome step by the GOP, is this an example of consistent liberal bias?)
5. Engberg Quote concerning the goal to balance the budget "
Best sign that this year is different? The Republicans are going after big-dollar entitlement spending."
I bolded the editorializing by Engberg so you would not miss it. Is this an example of consistent liberal bias?