On the road, so for simplicity’s sake, here’s ACLU’s release:

Judge Issues Order After Lawsuit Is Filed by AFL-CIO, ACLU, and National Immigration Law Center

SAN FRANCISCO – A federal judge today issued an order temporarily blocking the government from implementing a new Department of Homeland Security (DHS) rule that would cause U.S. citizens and other authorized workers to lose their jobs, and which would illegally use error-prone social security records as a tool for immigration enforcement. The judge’s order also stops the Social Security Administration (SSA) from beginning to send notices on Tuesday to approximately 140,000 employers across the country notifying them of the new rule, which would impact approximately eight million workers.

The order comes as a result of a lawsuit filed on Wednesday by the American Federation of Labor and Congress of Industrial Organizations (AFL-CIO), the American Civil Liberties Union, the National Immigration Law Center (NILC) and the Central Labor Council of Alameda County along with other local labor movements. A hearing on the groups’ request to permanently bar the implementation of the DHS rule is scheduled for October 1 before U.S. District Court Judge Charles Breyer.

“We are very pleased that the judge recognized the need to halt the implementation of this ill-advised DHS rule,” said John Sweeney, President of the AFL-CIO. “Employers have historically used SSA ‘no-match’ letters to exploit workers and this rule would only give them a stronger pretext for doing more of the same.”

In the lawsuit, the groups charge that the misguided rule violates the law and workers’ rights and imposes burdensome obligations on employers who receive SSA “no-match” letters that inform them of alleged discrepancies between employee records and the SSA database.

U.S. District Judge Maxine M. Chesney found that the groups “raised serious questions as to whether the new Department of Homeland Security rule is inconsistent with statute and beyond the statutory authority of the Department of Homeland Security and the Social Security Administration.”

“The court found the balance of hardships tips sharply in favor of staying the rule while it is being challenged,” said Scott A. Kronland of Altshuler Berzon LLP, who argued at today’s hearing. “We are confident we will prevail when the court hears the case on the merits.”

Full release.