Judicial precedent backs up the federal government's authority for immigration enforcement as challenges to "sanctuary" policies loom in federal courts.

California Gov. Gavin Newsom's lawsuit challenging the Trump administration from using the military to enforce federal immigration laws is a "crass political stunt endangering American lives,” Department of Justice lawyers said.

Gov. Gavin Newsom has filed a lawsuit against President Donald Trump to stop the National Guard and Marines from aiding immigration raids in Los Angeles, amid ongoing state and federal immigration policy disputes in other Democratic-led states.

California Attorney General Rob Bonta has announced his lawsuit against the Trump administration for deploying the National Guard in Los Angeles to contain the riots over the immigration raids that broke out this past weekend.

It was earlier this year that California Gov. Gavin Newsom was making nice with President Donald Trump as he sought help for his wildfire-battered state and moderating his approach ahead of a potential bid for the White House.

From the streets of Los Angeles to *** San Francisco courtroom ... to deploy the military to assist with ramped-up immigration raids. The lawsuit from California Gov. Gavin Newsom seeks a ...

The L.A. immigration crackdown is a prelude to a national day of action scheduled for June 14th. There is concern that the military use could result in U.S. martial law.

Gov. Newsom argues Los Angeles does not need the military to keep the peace: "To put it bluntly, there is no invasion or rebellion in Los Angeles; there is civil unrest that is no different from episodes that regularly occur in communities throughout the country,

Robert McWhirter, a constitutional law expert, discusses the lawsuit filed by California challenging President Donald Trump’s authority to activate the National Guard.