Why did the Voting Rights Act of 1965 require preclearance?

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Tags

1. #formula
2. #electoral
3. #places
4. #account
5. #certain
6. #prohibited
7. #enacted
8. #voting
9. #practices
10. #permitted
11. #right
12. #august
13. #federal
14. #process
15. #based
16. #rights
17. #imposing
18. #qualifications
19. #coverage
20. #intervention
21. #states
22. #required
23. #direct
24. #preclearance