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Fresh off his announcement of a lawsuit to block California's sanctuary state policies, Attorney General Jeff Sessions told Shannon Bream Wednesday that the policies are making it harder for federal immigration authorities.

The lawsuit -- which was filed Tuesday night and announced by Sessions Wednesday -- targets three recently-passed California state laws that interfere with federal immigration policies.

One of the laws limits state and local cooperation with Immigration and Customs Enforcement (ICE), while another prevents private companies from voluntarily cooperating with federal immigration enforcement officials.

Federal officials have accused California of standing in the way of its plan to step up enforcement of federal immigration laws. The Justice Department is also reviewing Oakland Mayor Libby Schaaf's decision to warn of an immigration sweep in advance, which ICE said allowed hundreds of immigrants to escape detention.

Sessions said the federal government has an obligation to "challenge" California on the issue. 

"California is a great state, it is an important part of America. We wanted a healthy and good relationship with it but federal law determines immigration policy. The state of California is not entitled to block that activity. Somebody needs to stand up and say no, you’ve gone too far, you cannot do this, this is not reasonable. It’s radical, really," he said.

California Gov. Jerry Brown blasted Sessions' announcement, accusing the administration of trying to "polarize America."

"At a time of unprecedented political turmoil, Jeff Sessions has come to California to further divide and polarize America. Jeff, these political stunts may be the norm in Washington, but they don’t work here. SAD!!!”

Sessions maintained his commitment to border security and legal immigration policies, accusing left-wing "extremists" of protecting "lawbreakers."

"Open borders is a radical, irrational idea that cannot be accepted. ...The United States of America is not some 'idea' - it's a secular nation-state."

Watch the interview above.

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