A law enforcement officer stands as people filled the streets of downtown Los Angeles in a massive 'No Kings' march, starting at City Hall and Molina Park. John Rudoff/Sipa/AP

The Trump administration on Monday challenged in federal court California’s ban on most law enforcement officers from wearing masks during operations , a move the Department of Justice insisted was necessary to protect federal agents.

In a lawsuit filed in the US District Court for the Central District of California, the Trump administration argued that California’s law, signed in September in response to immigration raids over the summer in Los Angeles, was an unconstitutional attempt to regulate federal law enforcement officers.

The move comes after months of immigration arrests conducted by masked federal

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