Civil Rights Movement
The law worked right away. Within a few months, 250,000 new black voters had signed up to vote. One out of every three of them was registered by a federal worker who replaced a racist registrar. In 1965, 74% of Mississippi's black voters actually voted, and more black politicians were elected in Mississippi than in any other state. By 1967, most African Americans were registered to vote in 9 of the 13 states in the South.