The concept of agenda-setting has been a fixture in contemporary academic research on media effects on political attitudes. Agenda-setting can also be a consideration in the development of campaign ad strategy. Explain the concept of agenda-setting. How can it be important to the success of a presidential campaign? How can ads be used to influence the contours of the campaign agenda? How can the circumstances of an election help or hinder the effectiveness of ads as a tool for agenda-setting? Be sure to offer some specific examples of when campaign ads have influenced the agenda, and when they have fallen short.