There have been many legal challenges to President Trump's California immigration sweeps, but one in particular could dramatically alter the policy.

The Trump administration on Monday asked a federal appeals court to pause a sweeping order from a California judge that required officials to stop making immigration arrests without probable cause in the southern part of the state.

Federal officials on Sunday defended President Donald Trump 's escalating campaign to deport immigrants in the U.S. illegally, including a California farm raid that left one worker dead, and said the administration would appeal a ruling to halt some of its more aggressive tactics.