WASHINGTON - States can't demand proof of citizenship from people registering to vote in federal elections unless they get federal or court approval to do so, the Supreme Court ruled Monday in a decision complicating efforts in Arizona and other states to bar voting by people who are in the country illegally.

They would need permission from a federally created panel, the Election Assistance Commission, or a federal court ruling overturning the commission's decision, to make tougher requirements stick.

Justice Antonin Scalia, who wrote the court's majority opinion, said federal law "precludes Arizona from requiring a federal form applicant to submit information beyond that required by the form itself."

BOSTON - Tuukka Rask shut out the Chicago Blackhawks in Game 3 of the Stanley Cup finals on Monday night and got enough help from the Bruins' offense to do it without another exhausting overtime.

After playing four extra periods in the first two games, the Bruins made an early night of it with second-period goals by Daniel Paille and Patrice Bergeron to win 2-0 and take a 2-1 lead in the Stanley Cup finals.

The teams split the first two games there, with the Blackhawks winning Game 1 in triple-overtime and the Bruins stealing home-ice advantage on Paille's goal in the first OT of the second game.