John H.I've always understood that it wasn't so much that you could point to specifics and say "this is Liberal and proves the bias" as it is a feeling of implication by the media that Conservativism = bad, Liberal = Good.
This idea of a penumbra of Liberalism in the media is avidly supported by the same group that decires the idea of a penumbra of implied rights in the Constitution but why look for consistancy.
Studies on the bias of the media that I recall always seemed to contradict one another. Probably methodilogically flawed as a snapshot of a given time makes a lot of assumptions.
The days of the authoratative media figure seems past. Cronkite was probably the last who a lot of people respected. Edward Morrow being a better but earlier example. sadly, the days of the demagogic media figure linger on.
Regards
John