I agree somewhat with what the author is trying to say in the article, but take issue with the above statement.
The country is split roughly fifty-fifty, liberals and conservatives, I think no one would dispute, yet 90% of broadcast media and an even higher percentage of print media go for the liberal half of its potential market, day in and day out. In my hometown, the people will reliably vote 65% Republican each and every election, yet the hometown newspaper berates conservative ideology, and openly shills for Democrat candidates. It's about the IDEOLOGY, apparently.
I don't think the country is split 50/50 liberal/conservative. There are far more conservatives than liberals. The question comes down to all those in the middle and which way they lean. You might be able to get 50 percent to vote Democratic, but that includes Democratics who are not particularly liberal and also includes Democrats who pawn themselves off as conservative lite (when they're not). I don't think the country would even split 50/50 Repub/Dem in elections if it weren't from the media. I think it would be more like 60/40 if the media were a fair and objective arbiter. That's what a nearly uniform liberal bias in the press buys for the Dems, a chance to govern.