It happens on both sides, and it wouldn't be unreasonable to argue that the left is much more guilty of this than the right. Fox News has become a meme because it is the only mainstream news source that blatantly shows conservative bias. Try pointing to mainstream news sources that blatantly show liberal bias and you'd lose count.
No, it just has slightly weaker right-wing bias than Fox.
They have de facto supported nonsensical positions because CNN pioneered the "two sides to every argument" stupidity in their effort to look "unbiased". CNN's reporting is heavily distorted, but the distortion is usually giving credibility when it isn't deserved. Fox simply pushes their agenda directly, while CNN gives cranks a stage no matter how stupid their position is, because calling out even the obviously wrong is "biased". Often this involves conservative opinions (for varying definitions of "conservative"), but almost every opinion of every topic gets the same treatment from CNN.
Is Fox "News" covered by these laws? Surely you're not suggesting with a straight face that Fox News is "fair and balanced" ?