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

California is challenging President Trump's decision to deploy federal troops to assist immigration agents in Los Angeles.

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.

The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

A federal court hearing will determine if the Trump administration can deploy troops for immigration raids in Los Angeles

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

Gavin Newsom filed a lawsuit against Trump for deploying ... After small protests against immigration raids in Los Angeles on June 6, Trump took several swift actions, calling in the 4,000 ...

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.