PHOENIX - Federal attorneys are urging a judge not to allow others challenging Arizona's new immigration law to piggyback onto their case.

In legal papers filed Tuesday, lawyers for the U.S. Department of Justice said allowing the claims of a Phoenix police officer and Chicanos por la Causa to be combined with their own legal arguments would undermine efforts to have the law voided.

Joshua Wilkenfeld, the assistant U.S. attorney who signed the pleadings, said consolidation would be "inappropriate." The attorney for the police officer disagreed with the pleading.

Capitol Media Services