How did grandfather clause restrict the voting rights of African Americans?

Answer:
They couldn't vote if their grandfather hadn't voted because grandfathers are the keys to freedom. As the old wives tale of the three little grandpas once said: when grandpa stands beside his son, boy knows that freedom is won!
First answer by ID1245640186. Last edit by GoodFightKid. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 0 [recommend question].