"Under the terms of the Voting Rights Act of 1965, states with questionable civil rights reputations 45 years ago — such as South Carolina — cannot amend voting laws without federal approval. Assistant Attorney General Thomas Perez said non-white voters in South Carolina are “significantly burdened” by requiring photo ID."
Make many of these as dependant as possible on government assistance.
Indoctrinate the youth in schools by both teaching Socialist theory and denigrating or completely ignoring the accomplishments of those who created this Nation and those who came earlier and provided inspiration to our founders.
We are very close to realizing the concerns that Jefferson and Tocqueville had for a Democratic nation in which the majority can tyrannize the rest of the people. If the urban populations in individual states reach a mark that will allow for the majority vote in a sufficient number of states, and these are sufficiently indoctrinated and/or dependent, then national elections will be moot points and the tyranny will begin.
Prohibiting Arizona and South Carolina from doing their jobs will be small potatoes compared to what can follow.