Kansas recently passed a law requiring voters to prove their citizenship before they can register to vote. Arizona also passed such a law. But here's the rub: Federal law doesn't make voters prove their citizenship through a document like a passport or a birth certificate. Under federal law, voters merely have to affirm they're citizens, and that's that.
On Monday, the Tenth Circuit heard oral arguments in an appeal of the Kansas version of the case. Earlier this year, a U.S. District Court in Kansas ordered the federal Election Assistance Commission (EAC) to alter federal voting forms to reflect each state's requirements.