Although the Radio and Television News Directors Association code of ethics states that directors should present news in a way that is accurate and balanced, that doesn't always happen. There are many factors that affect television's coverage of news.
Among the groups who pressure the media most frequently are car dealers. According to some news editors, they discourage stories that reflect negatively on the economy.
As an investigative reporter put it, "Power has a price, and it's for sale."
NBC for example is owned by General Electric. In 1990, the Today Show planned a story on boycotts. The largest boycott going on at the time was a boycott of GE by a group called INFACT, who objected to GE's role in the production of nuclear weapons. The producers refused to do the story and instead focused on smaller boycotts.
CNN is owned by Time Warner, which also owns record labels, production companies, home video distributors, magazines and a number of other television networks. Disney controls ABC, a number of magazines and newspapers, theme parks, a hockey team, and a publisher. Westinghouse owns CBS, a number of local television stations, 39 radio stations, investment firms and hazardous waste management facilities.