This document discusses the history and evolution of voting rights in the United States. It outlines how the Constitution established states' rights to set voting qualifications but also placed restrictions. Over time, amendments expanded voting rights by removing barriers such as race (15th), sex (19th), poll taxes (24th), and setting the minimum age to vote at 18 (26th). Currently, states can require citizenship, residency, age of 18+, and voter registration but are prohibited from using literacy tests or poll taxes as qualifications.