The Justices of the US Supreme Court sit for their official photograph on October 8, 2010 at the Supreme Court in Washington, DC. (Getty Images)
WASHINGTON (CNN) -- The Supreme Court on Monday tossed out a provision inn Arizona's voter registration law that required proof of citizenship.
The 7-2 majority said the state's voter-approved Proposition 200 interfered with federal law designed to make voter registration easier.
The state called it a "sensible precaution" to prevent voter fraud. Civil rights groups countered that it added an unconstitutional and burdensome layer of paperwork for tens of thousands of citizens.