President Johnson signed the Voting Rights Act into law allowing people of color to vote without barriers to political involvement.
Barbara Jordan and Andrew Young entered Congress as the first African-Americans elected since Reconstruction.
Congress extended Section 5, a key part of the Voting Rights Act, for 25 more years.
South Carolina's voter ID law, one of the most restrictive in the nation, would prohibit 180,000 African-Americans from voting.
In the decision against Alabama's NAACP in Shelby County v. Holder, the Supreme Court ruled that certain jurisdictions with a history of voting discrimination did not have to get pre-approval for voting rule changes.
