When taking a step back to critically evaluate the news we consume, we're usually left to wonder why it so often seems sensationalized and emotionally charged. Seldom are news stories presented that don't elicit a strong, sometimes visceral, emotional reaction. The reason behind this is best understood in the context of the principal-agent problem.
In this scenario, the agent is the news company, and the principal is the consumer of their news. The interests of the news company are to maximize profits in the name of maximizing shareholder value. The interests of the news consumers are different; their interests are to be informed, often about American politics. Therefore, the interests of news companies and of news consumers are different, creating a principal-agent problem. What results is news companies shirking, or displaying news not for the sake of informing their viewers, but for the sake of maximizing shareholder value. In order to do so, news companies must maximize their viewership, thereby maximizing ad revenue. The best way they've found to do this is creating sensationalized and emotionally charged news that elicits strong reactions and keeps viewers entertained. As a result, American news shows have devolved into entertainment programs masquerading as sources of information. In the principal-agent context, it's plausible that this is merely the slack that exists between informative and entertaining reporting. If that's the case, as consumers, we ought not to allow such significant slack to exist.