Everyone has an agenda. Everybody wants to push a cause they want to spread. However, how do people go about spreading an agenda? Agenda Setting Theory is where the focus of a subject is influenced to push an agenda. It can be used in many ways and is typically used as a manipulation tactic. Here is what the theory can do.
Whether you realize it or not, the media holds a great power over the public that watches them. The media spreads around information, and can intentionally control how we think about an issue. The angle of a story, the contents of a story, or even a small statistic of a story. The media will find any detail that interests them, and uses it to make the public do what they want. The theory truly is a scary one at best and a destructive one at worst.
It's entirely possible to promote a cause by shifting the focus of any incident. Take elections for example. Media can control the subjects of their news to get the effect they want. For example, 2004 Presidential candidate, Howard Dean, was leading a somewhat promising presidential campaign, until he made an excited scream at the end of one of his speeches. The news reported his scream as "un-presidential" and suddenly, his support dropped like flies.
Another example would be 2014 England Prime Minister candidate, Ed Miliband. Miliband was promising candidate for Prime Minister, right up until he was caught on camera eating a sandwich. The photo was spread around by the media very quickly. All his political enemies focused on how he struggled to eat it, and called him a clumsy old man who shouldn't be in power. The tactic worked, and Miliband lost all support for his campaign. Yes, a man's political career was ended because of a sandwich. It's as stupid as it sounds.
Both of these incidents involved the news covering a specific aspect of the respective politicians. They portrayed them in an incriminating manor, and stirred up the public to turn away from these men. Keep in mind, the scream Howard Dean did back then is child's play compared to the antics modern Presidential Candidates can get into, such as Trump and his endless supply of childish tweets. And Miliband having him lose his election over a bacon sandwich is about as crazy as it sounds. Guess who turned it into a scandal, the media that controlled the public.
https://books.google.com/books?id=py3pfMtLoOgC&lpg=PP1&ots=KJUSo24JCN&dq=agenda%20setting%20theory&lr&pg=PA4#v=onepage&q=agenda%20setting%20theory&f=false
https://www.youtube.com/watch?v=l6i-gYRAwM0
https://www.huffpost.com/entry/ed-miliband-bacon-sandwich_n_5bbe27b0e4b01470d0580898
