Rights war naacp and ongoing struggle for justice. Which Supreme Court ruling do you think had the most Significant Impact on the ability of africanamericans to vote . I think the very first one, wynn versus United States who struck down the grandfather clause and the reason why is because the grandfather clause was something on its face basically said if your grandfather couldnt vote, you couldnt vote. However, it was the very first Voting Rights case brought by the naacp before the u. S. Supreme court and it was their first victory and spurred them on to realize that the right to vote should be up there with criminal justice issues and Economic Issues and housing and the very first case so you see that the n achlt achlt krchaacpt 1915 case and to the last few months naacp is still fighting Voting Rights cases and the one that got them on the path and so important to law the foundation for future Voting Rights for africanamericans. Historic past past and you were able to vote for the