Lawyers for the U.S. Justice Department oppose a request to merge their challenge to the new Arizona immigration law with a lawsuit by a police officer who also is seeking to overturn the law.

The federal lawyers oppose Phoenix police Officer David Salgado's request to consolidate the cases because they say it would prejudice or delay their challenge.

The officer's attorney had argued that the cases are virtually identical because they claim the state law is trumped by federal immigration law and because both seek to keep the state law from being enforced.

The Justice Department says it's challenging more sections of the law than Salgado and that its contention that the law is trumped by federal law differs from the officer's arguments.

The push for gay marriage in New Jersey suffered a setback Monday when the state Supreme Court said six gay couples who claim New Jersey has denied them the rights granted to married heterosexual couples must argue their case through the lower courts.
The court was split, 3-3, in the decision; four affirmative votes are needed for a motion to be granted.

Chief Justice Stuart Rabner and Justices Roberto Rivera-Soto and Helen Hoens said in an order that the issue "cannot be decided without the development of an appropriate trial-like record," and denied the plaintiffs' motion without prejudice.

They added that they reached no conclusion on the merits of the plaintiffs' allegations that the Civil Union Act violates their constitutional rights.

The nation's highest court agreed to decide whether the 2007 state law infringed on federal immigration powers and should be struck down.

The law at issue in the case is different from the strict new Arizona immigration law passed earlier this year and criticized by President Barack Obama that requires the police to determine the immigration status of any person suspected of being in the country illegally.

But the Supreme Court's eventual decision in the case, depending on how the justices rule, could end up affecting the pending legal challenges to the new law as well.

The Obama administration last month urged the Supreme Court to rule that the 2007 law was preempted by federal immigration rules and would disrupt the careful legal balance that the U.S. Congress struck nearly 25 years ago.

The Arizona law suspends or revokes licenses to do business in the state in order to penalize employers who knowingly hire illegal immigrants. It also requires employers to use an electronic verification system to check the work-authorization status of employees through federal records.

The Legal Arizona Workers Act was adopted after a federal immigration overhaul law died in Congress in 2007.