Are journalists like Chris Wallace still valued at Fox News? How does the network distinguish President Trump's close relationship with hosts like Sean Hannity and actual fair reporting? Brian Stelter, the host of CNN's "Reliable Sources" and author of "Hoax: Donald Trump, Fox News and the Dangerous Distortion of Truth," discusses how ratings play a large role in how much air time news gets on Fox versus commentary for its audience. Watch the full episode to hear more from Stelter on his book, which takes a deep look into the network's credibility.