The Insurrection Act is a federal law that allows the president to deploy the military and National Guard troops to suppress civil disorder, insurrection or rebellion. It was last used by President George H. W. Bush during the Los Angeles riots after the Rodney King verdict in April 1992.

Gavin Newsom asked the Trump administration on Sunday to rescind its move to deploy 2,000 California National Guardsmen to Los Angeles to subdue immigration protests, accusing the White House of illegally overriding his authority and intentionally inflaming tensions with protesters.

Gov. Gavin Newsom on Friday suggested California consider withholding tens of billions in annual federal tax dollars amid reports Donald Trump is preparing funding cuts targeting the state. Newsom’s suggestion came after CNN reported the president was considering a “full termination” of federal grant funding for California’s universities.