Civil Rights Movement
For almost 100 years, registrars (the government workers who had registered people to vote) were all white. They had total power over who they could register and who they would not register. If a registrar refused to let a black person register, that person could only file a lawsuit, which they were not likely to win. However, the Voting Rights Act finally made a change to this system. If a registrar discriminated against black people, the Attorney General could send federal workers to replace local registrars.