The U.S. Supreme Court threw out an Arizona law that required evidence of citizenship when people register to vote, in a victory for minority-rights advocates and the Obama administration.

The justices, voting 7-2, said Arizona's proof-of- citizenship law runs afoul of a federal statute that sets out registration requirements.

The ruling limits the role played by the states in national elections and raises questions about similar laws in three other states -- Alabama, Kansas and Georgia.

To contact the reporter on this story: Greg Stohr in Washington at gstohr@bloomberg.net

To contact the editor responsible for this story: Laurie Asseo at lasseo1@bloomberg.net