The California Peace Officers Association said the conflicting rules are creating confusion for police on the street and are now looking for Sessions to clarify those issues.
The Justice Department, in a federal lawsuit filed Tuesday, is challenging three California laws that, among other things, bar police from asking people about their citizenship status or participating in federal immigration enforcement activities.
Sessions received a polite if not warm reception from law enforcement officials, even when he told them his goal was to make their jobs safer.
In his speech, Sessions argued the laws are harmful to the state's residents and prevent law enforcement officers from doing their jobs.
U.S. Attorney General Jeff Sessions addressing a meeting of the Alliance of California Law Enforcement, flanked by U.S. Attorney for the Eastern District of California McGregor Scott (left) and former Sacramento County Sheriff John McGinnis.
Late Tuesday the Justice Department sued to overturn three California statutes that render it more hard for officials from Immigration and Customs Enforcement (ICE) and the Customs and Border Protection (CBP) to obtain the cooperation of local officials and private employers to make arrests.
Sessions is set to speak on the matter and noted that they plan to win their case against "these unjust, unfair and unconstitutional policies that have been imposed".
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Brown's signature means that police will be barred from asking people about their immigration status or participating in immigration enforcement activities starting January 1.
Brown and Becerra at a news conference in Sacramento said the three challenged laws are "fully constitutional". Another stops local governments from contracting with for-profit companies and ICE to hold immigrants. "Neither should the Trump administration".
"What Jeff Sessions said is simply not true and I call upon him to apologize to the people of California for bringing the mendacity of Washington to California", said Brown. "How dare you needlessly endanger the lives of law enforcement just to promote your radical open borders agenda?" AG Becerra says California is not in the business of deportation, but in the business of safety.
"Her actions support those who flout the law, and [that] only validates illegality", he said.
"But California, we have a problem", he said. In his address, Sessions compared California's resistance to federal immigration law to the efforts of the Old South and the Confederacy to resist the Union.
Brown and California Attorney General Xavier Becerra are directly named in the suit - and are ready for the fight. Sessions was hopping mad while echoing ICE Director Thomas Homan's previous accusations that Schaaf had given the heads up to 800 criminals who managed to avoid arrest.