This document discusses key terms and concepts related to voting and voter behavior in the United States. It defines suffrage, enfranchisement, disenfranchisement, and the electorate. It emphasizes the importance of voting and being an informed citizen. It examines who can and cannot vote, as well as reasons why some eligible citizens do not vote. It analyzes trends in voter turnout based on age, religion, ethnicity, income, education, geography, gender, and party identification. It outlines the history of expanding suffrage and laws protecting voting rights. Finally, it discusses state measures that can be decided directly by voters.