Give examples of how the media have had an effect on the publics evaluation of specific events?

1 ... The longer the story is on the news, the more people thought it was important

2. People's opinion shifted with tone used

Effectively communicating a message is critical to political success. the key is gaining control over the political agenda, which involves getting one's priorities presented at the top of the daily news.

I think the bolded part is a better answer ...