Voting Rights Act of 1965
Signed by President Lyndon B. Johnson months after state troopers attacked peaceful voting rights marchers at Selma, Alabama, the act enforced the Fifteenth Amendment by prohibiting voting practices that denied or abridged the right to vote on account of race or color. It suspended literacy tests in jurisdictions covered by its formula, authorized federal examiners to register voters there, and required those jurisdictions to obtain federal “preclearance” before changing voting rules.