Then why are cons always denying that Fox is conservative? They say it's "fair and balanced" with no political bias. Nonsense.
BTW. If there is such a left wing bias in the MSM, why were the republicans able to take the house in 1994 and keep it for 12 years? Why did 5 of the last 7 presidential elections go republican? Your argument that "CBS, NBC, ABC, CNN attempt in every election to sway the vote to the left" carries no weight.
Maybe you should also look at how the ratings are calculated for Fox vs, say, CNN. It's calculated differently. Fox viewers tend to turn it on then leave it on while CNN viewers come back several times during the day.