The New Nullification Movement | The Nation
"In reality, the two-tiered system of registration being set up in Arizona and Kansas has far less to do with stopping voter registration fraud (which, as shown, is very rare in both states) than with “nullifying” federal laws that Republicans don’t like, such as Obamacare. There’s a symmetry between shutting down the government and creating separate and unequal systems of voting. It’s a strategy that dates back to the antebellum South, when fierce segregationists like John C. Calhoun tried to prevent the federal government from interfering with slavery and taxing the region."