"In the late 1880s, the worsening agricultural depression catalyzed Populist and third party movements, leading to interracial coalitions. Struggling to stay in power, in the 1890s the Democrats in Arkansas followed other Southern states in passing legislation and constitutional amendments that disfranchised blacks and poor whites. In 1891 state legislators passed a requirement for a literacy test, knowing it would exclude many blacks and whites. At the time, more than 25% of the population could neither read nor write. In 1892, they amended the state constitution to require a poll tax and more complex residency requirements, both of which adversely affected poor people and sharecroppers, forcing most blacks and many poor whites from voter rolls."
(Paste it Google and you will find info) I get happy with these links, don't need warnings..good teaching moments in these day and age.