Olbermann is an idiot.
The very fact that he is repeatedly inflicted upon us, despite his inability to garner ratings, is evidence, in and of itself, of the left-wing media bias.
Actually worse. He's a typical liberal elitist who's too smart by half. People like Olbermann and Matthews aren't capable of honest debate because facts are rarely on their side. Therefore they rely on interruption, namecalling and volume to strengthen their argument in the hope that those techniques will quell the opposition. They don't.
As usual it's the liberals who, after inventing it, are the first to invoke political correctedness...and the first to circumvent it.