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.

The situation has all the elements that the president seeks: a showdown with a top political rival in a deep blue state over an issue core to his agenda.

The Trump administration has deployed the California National Guard in response to protests in Los Angeles that began Friday evening over immigration enforcement operations, which resulted in some clashes between demonstrators and authorities,

California political leaders are facing a perilous and complex political situation as Trump sends the National Guard into Los Angeles.

President Trump's new ban on travelers from 12 countries has come under harsh criticism from California organizations representing Asians, Muslims and Jews.

The Trump administration is preparing to cancel a large swath of federal funding to California, an effort which could begin as soon as Friday, according to multiple sources.

Thousands of University of California and California State University system workers are unsure about their jobs and the future of their research after reports that President Donald Trump is going after the federal funding for California.

Bernie Sanders' comments come after Trump deployed 2,000 National Guard troops to help quell immigration protests in Los Angeles.