So much of the liberal bias on cable networks is visual. It can impact the casual viwer on the treadmill at the gym watching with the audio off. Case in point is the video embedded at right from the July 15 edition of "The Situation Room" on CNN. [audio available here]
In it, anchor Wolf Blitzer tries to put a substantial wedge between House Minority Leader John Boehner (R-Ohio) and presumptive GOP nominee Sen. John McCain (R-Ariz.) over drilling for oil in ANWR. Notice that while Boehner defends opening up a small patch of the national Arctic wilderness for oil exploration, CNN producers make Boehner share a split-screen with footage of frolicking wildlife. The caption on screen reads, "Republicans at Odds Over Oil: McCain Against ANWR Drilling."
The message is clear: the GOP is the party that wants to shed [animal] blood for oil.