How a proof-of-citizenship voting rule may tilt a key swing state

"The current two-tiered registration system in Arizona is already extremely confusing, but the whiplash created by these back-to-back court rulings is likely to exacerbate that," Cherry, the legal director of VoteRiders said. "If the Supreme Court were to change the registration requirements in Arizona yet again prior to the election, voter confusion is certain to increase even further."