All are controlled by a small elite group and cross ownership is common. A leader is inherently newsworthy so has easy access to mass media. They use this exposure to set the political agenda often by merely discussing certain topics. Being able to define an event or issue assures political power. The average person turns to the media for help in understanding events ensuring access to the media means control of public opinion.
Politicians can manipulate the mass media by nature of their position.
America's mass media closely follows the government's agenda. Reporters like most people suffer from elemental patriotism which clouds their outlook. Their overwhelming wish to think positively of themselves, their institutions and their leaders is the foundation of their patriotism. It is indoctrinated in American citizens from childhood that the people rule strengthening their belief. The government also rewards conformity through use of leaked information and exclusive stories.