voting rights timeline By korafrary Period: 1850 to 2000 voting rights timeline 1865 13th amendment 1869 15th amendment 1896 laws to take voting rights from African Americans 1898 supreme court rules that literacy tests are constitutional 1915 grandfather clause is constitutional 1920 19th amendment 1937 poll taxes are constitutional 1964 24th amendment 1964 freedom summer 1965 voting rights act