| U.S. History students from Austin, Minn. High School visit the Supreme Court in Washington, Monday, June 17, 2013, in anticipation of key decisions being announced. With a week remaining in the current Supreme Court term, several major cases are still outstanding that could have widespread political impact on same-sex marriage, voting rights, and affirmative action. | 
     WASHINGTON     
(AP) -- 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.
The justices' 7-2 
ruling closes the door on states independently changing the requirements
 for those using the voter-registration form produced under the federal 
"motor voter" registration law. 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."
Voting rights advocates welcomed the ruling.
"Today's
 decision sends a strong message that states cannot block their citizens
 from registering to vote by superimposing burdensome paperwork 
requirements on top of federal law," said Nina Perales, vice president 
of litigation for the Mexican American Legal Defense and Educational 
Fund. "The Supreme Court has affirmed that all U.S. citizens have the 
right to register to vote using the national postcard, regardless of the
 state in which they live."
Under Proposition 
200 approved in 2004, Arizona officials required an Arizona driver's 
license issued after 1996, a U.S. birth certificate, a passport or other
 similar document before the state would approve the federal 
registration application. It can no longer do that on its own authority.
Less
 than 5 percent of people registering to vote in Arizona use the federal
 form, said Matt Roberts, a spokesman for Arizona Secretary of State Ken
 Bennett. The rest register through the state, meaning they will 
continue to be asked to provide proof of citizenship when signing up to 
vote.
But because of the court ruling, people 
can merely choose the less onerous federal form, which asks people to 
swear if they are citizens or not, but does not demand proof.
Arizona
 Attorney General Tom Horne, who argued the case before the Supreme 
Court, expects the state will ask the Election Assistance Commission to 
approve the citizenship proof on the federal form and to fight any 
denial in court - the process laid out in Monday's ruling.
"The
 U.S. Supreme Court has given us a clear path to victory for the people 
of Arizona, who overwhelmingly approved the state constitutional 
amendment that was the subject of the legal challenge," 
Horne said.  
"Since the U.S. Supreme Court has made it clear that this pathway 
exists, Arizona should use it. 
The sanctity of the ballot box is a 
cherished right for all Americans and it must be protected."
Federal officials deadlocked on Arizona's request in 2005, and the state did not appeal.
In other actions Monday, the court:
-Ruled
 that agreements between the makers of name-brand and generic drugs to 
delay the generics' availability can be illegal and challenged in court.
-Ruled
 that prosecutors in some instances may use a suspect's silence at an 
early stage of a criminal investigation against him or her, before the 
suspect has been arrested or informed of constitutional rights.
-Agreed
 to decide in its next term a new dispute involving race; specifically, 
whether federal housing law requires proof of intentional 
discrimination.
The Arizona case is the first 
of two major voting decisions to be made by the court this month. 
Justices have yet to say whether a section of the Voting Rights Act of 
1965, a law that has helped millions of minorities exercise their right 
to vote, especially in areas of the Deep South, was still needed, 
despite several justices voicing deep skepticism during arguments in 
February.
Arizona has tangled frequently with 
the federal government over immigration issues involving the Mexican 
border, health care and more. But the decision on voter registration has
 broader implications because other states have similar requirements, 
such as Alabama, Georgia, Kansas and Tennessee, and still others are 
contemplating such legislation.
Georgia 
Secretary of State Brian Kemp called the decision disappointing but said
 he would continue working with state officials to "provide a safe, 
secure and legal system for voter registration."
Tom
 Caso, a professor at Chapman University School of Law in California and
 supporter of the Arizona law, said the decision "opened the door" to 
noncitizen voting.
"The court's decision 
ignores the clear dictates of the Constitution in favor of bureaucratic 
red tape," Caso said. "The notion that the court will not enforce the 
Constitution unless you first apply to a commission that cannot act 
because it has no members is mind-boggling."
Currently,
 the Election Assistance Commission has no active commissioners. The 
four commissioners are supposed to be nominated by the president and 
confirmed by the Senate. The last two left in 2011, according to the 
panel's website.
Kathy McKee, who led the push
 to get Proposition 200 on the ballot in Arizona, said the ruling makes 
it harder to combat voter fraud, including fraud carried out by people 
who don't have permission to be in the country. "To even suggest that 
the honor system works, really?" McKee said. "You have to prove who you 
are just to use your charge card now."
Justices
 Clarence Thomas and Samuel Alito were the only two dissenters. Alito 
said the decision means that Arizona now has two voter registration 
systems, and that the success of an applicant could come simply by the 
system he or she chooses. "I find it very hard to believe that this is 
what Congress had in mind," he said.
Opponents
 of Arizona's law saw it as an attack on vulnerable voter groups such as
 minorities, immigrants and the elderly. They say they've counted more 
than 31,000 potentially legal voters in Arizona who easily could have 
registered before Proposition 200 but were blocked by the state law in 
the 20 months after it passed. They say about 20 percent of those 
thwarted were Latino.
Arizona officials say 
they should be able to pass laws to stop noncitizens from getting on 
their voting rolls. 
The Arizona voting law was part of a package that 
also denied some government benefits to people in the country illegally 
and required Arizonans to show identification before voting.
Arizona
 can ask the federal government to include the extra documents as a 
state-specific requirement, Scalia said, and challenge any adverse 
decision by the government in court.  Louisiana's request already has 
been granted, Scalia said.
The ruling upholds 
one by the 9th U.S. Circuit Court of Appeals, which said the 1993 
National Voter Registration Act of 1993 trumps Arizona's Proposition 
200.
The case is 12-71, Arizona v. Inter Tribal Council of Arizona, Inc.