You\u2019re at the voting booth, ready to cast your vote for the candidate who will support the issues you care about. But how did you come to care about those issues to begin with? Did you and your fellow Americans set the political agenda, or do politicians dictate what\u2019s important? Gabriel Lenz is the author of \u201cFollow the Leader?: How Voters Respond to Politicians\u2019 Policies and Performance.\u201d We talk with him about political influence and how it shapes democracy.