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President Joe Biden's Department of Justice filed a lawsuit this week against California, seeking to unravel a state law that aims to protect the rights of undocumented state residents against federal immigration control policies.
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But in a lawsuit filed Wednesday, the Justice Department hit back, arguing the law is impeding law enforcement efforts in the state by hindering cooperation between state and local police and federal authorities.

The department also argued that the law is unconstitutional under the Supremacy Clause, which declares that federal law, generally, takes precedence over state laws.

"This act impedes immigration law enforcement operations in California," Attorney General Merrick Garland said in a news release. "The United States will work to ensure that our state and local law enforcement partners are not penalized for doing their jobs to keep our communities safe."

"A state cannot simply declare federal laws invalid," principal deputy assistant attorney general Brian M. Boynton, head of the Justice Department’s Civil Division, added. "This act makes enforcement of federal immigration laws difficult and strains the important law enforcement partnerships that help keep illegal aliens off the street."

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