The Cable News Network (CNN), an American basic cable and satellite television channel, has been the subject of several controversies. This article recounts controversies and allegations relating to both the domestic version of CNN, and its sister channels CNN International and CNN-IBN.
CNN has often been the subject of allegations of liberal bias. In research conducted by the Shorenstein Center on Media, Politics and Public Policy at Harvard University and the Project for Excellence in Journalism, the authors found disparate treatment by the three major cable networks of Republican and Democratic candidates during the earliest five months of presidential primaries in 2007: "The CNN programming studied tended to cast a negative light on Republican candidates – by a margin of three-to-one. Four-in-ten stories (41%) were clearly negative while just 14% were positive and 46% were neutral. The network provided negative coverage of all three main candidates with McCain faring the worst (63% negative) and Romney faring a little better than the others only because a majority of his coverage was neutral. With the exception of Obama, Democrats tended not to fare well either. Nearly half of the Illinois Senator’s stories were positive (46%), vs. just 8% that were negative, but both Clinton and Edwards ended up with more negative than positive coverage overall. While Democrats on average tended to have more positive coverage, the trend was skewed by particularly positive coverage of Obama."
Writer Eric Alterman has noted that many left-leaning critics view CNN as more biased than most other corporate-run journalism, supporting business interests of its parent company and sponsors, and refusing to question official sources or present perspectives of leftist critics.