In a lawsuit filed July 6 in federal court in Arizona, the U.S. Department of Justice made good on its promise to challenge Arizona's immigration law.

Arizona law S.B. 1070, due to take effect July 29, was challenged on the basis that it unconstitutionally interferes with the federal government’s authority to set and enforce immigration policy, accoridng to a July 6 news release from the Department of Justice.

Business and agriculture officials in Arizona have expressed concern about the law's effect on labor availability and the potential for the law to cause economic loss caused by promised boycotts of the state by some groups.

In the release, the administration said that “the Constitution and federal law do not permit the development of a patchwork of state and local immigration policies throughout the country.”

The Department of Justice has requested a preliminary injunction to enjoin enforcement of the law,  according to the release. The department believes law’s operation will cause irreparable harm, according to the release.

“Arizonans are understandably frustrated with illegal immigration, and the federal government has a responsibility to comprehensively address those concerns,” Attorney General Eric Holder said in the news release. “But diverting federal resources away from dangerous aliens such as terrorism suspects and aliens with criminal records will impact the entire country’s safety.”
 
Arizona Republican Governor Jan Brewer said in a statement July 6 it was wrong for the federal government to sue the people of Arizona for helping to enforce federal immigration law.

“As a direct result of failed and inconsistent federal enforcement, Arizona is under attack from violent Mexican drug and immigrant smuggling cartels,” she said. “Now, Arizona is under attack in federal court from President Obama and his Department of Justice.”

Brewer said the lawsuit will be a waste of taxpayer funds that could be better used against Mexican drug cartels than the people of Arizona.

“The truth is the Arizona law is both reasonable and constitutional,” she wrote. "Arizona’s law is designed to complement, not supplant, enforcement of federal immigration laws.”

She also slammed federal officials for having a selective response to the nation's patchwork of immigration laws.

“The irony is that President Obama’s Administration has chosen to sue Arizona for helping to enforce federal immigration law and not sue local governments that have adopted a patchwork of ‘sanctuary’ policies that directly violate federal law,” she said on her website.