Most media outlets are slightly biased towards Republicans, and Fox News is obviously heavily biased towards Republicans.
Second part is obviously true. Anyone with a brain knows the first is not. The Media is biased towards sensationalism which means higher ratings and more papers/magazines sold. They also are biased towards corporations seeing how they are owned and run by them. That means they're also biased towards the wealthy and elite, who read the news, write the news, and decide what's put on the news.
None of that means a liberal or conservative bias.
Nor does any of that mean that CNN hasn't already decided it's Hillary or Bust in 2008 or that FNC isn't a pro-GOP mouthpiece.