Arizona v. Inter Tribal Council of Arizona

UNITED STATES - MARCH 18: Arizona Attorney General Tom Horne speaks to the media following the Supreme Court oral arguments in the Arizona v. Inter Tribal Council of Arizona case on Monday, March 18, 2013. The case revolves around the Proposition 200, passed in 2004 by voters, which requires Arizona residents to provide proof of citizenship when registering to vote. (Photo By Bill Clark/CQ Roll Call)