The U.S. Department of Justice on Thursday issued requests for data to “multiple” California sheriffs about any migrants they were holding in their county jails, including in San Francisco and Los Angeles.

The announcement by Attorney General Pamela Bondi opened a contentious new front in President Donald Trump’s immigration crackdown, in a state that largely blocks law enforcement officers’ cooperation with federal immigration authorities. Specifically, the Department of Justice said it sought “lists of all inmates in their jails who are not citizens of the United States, their crimes of arrest or conviction, and their scheduled release dates.”

In an unattributed statement, the Department of Justice said it sought the information from the sheriff’s offices in four counties: San Francisc

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