Ariz. governor taking state's appeal on implementation of immigration law to US Supreme Court.

PHOENIX — Arizona Gov. Jan Brewer wants the U.S. Supreme Court to overturn a ruling that put the most controversial parts of the state's immigration enforcement law on hold.
The appeal comes after Brewer lost an initial appeal April 11, when a three-judge panel of the 9th U.S. Circuit Court of Appeals refused to reverse a lower court's order that prevented key parts of the law from being enforced.
The U.S. Justice Department filed a lawsuit in a bid to invalidate the law.
Brewer's lawyers have argued the federal government hasn't effectively enforced immigration law and that the state's intent in passing the law was to assist federal authorities.
The U.S. Justice Department has argued the law intrudes on its exclusive authority to regulate immigration and burdens legal immigrants.