precedent in immigration battle

A federal appeals court on Wednesday upheld an Arizona law that penalizes businesses that knowingly hire illegal immigrants and requires them to verify the employment status of their workers.
The 9th U.S. Circuit Court of Appeals decision rejected a challenge by business and civil rights groups that contend that the law infringes on federal immigration powers.

I wonder what things would look like if the residential construction market were strong and US was in desperate need of workers who have a work ethic and are willing to do hard labor.

Construction of new homes and apartments fell to its weakest pace in 17 years in August, far more than expected, but lower mortgage rates and tax credits have given builders some glimmer of hope of a possible rebound.
Housing construction dropped 6.2 percent last month, the Commerce Department reported Wednesday, far larger than the 1.6 percent decline analysts had been expecting.
It was the slowest building pace since January 1991, but that should help clear out bloated inventories of unsold homes. Building activity is on track to slide below the 1 million mark for the year, the first time that has happened in more than six decades.