California is challenging President Trump's masked immigration raids with a bill banning law enforcement officers from operating anonymously. Why it matters: The proposal responds to a surge in U.S. Immigration and Customs Enforcement sweeps amid the federal administration's aggressive deportation push.

According to federal law enforcement officials, California’s sanctuary state policy that prohibits immigration enforcement in the state jail and prison system is responsible for many of the recent raids.

Todd Lyons, the head of U.S. Immigration and Customs Enforcement, defended his tactics last week week against criticism that authorities are being too heavy-handed. He has said ICE is averaging about 1,600 arrests per day and that the agency has arrested “dangerous criminals.” It is an assertion many lawmakers and city leaders decry.

Law enforcement agencies across Southern California violated state law more than 100 times last month by sharing information from automated license plate readers with federal agents, records show.

Two of Los Angeles‘ 12 major professional sport franchises have issued public statements on ICE raids and protests over the immigration enforcement operations in the city with a vast and diverse immigrant population and sports fan base.

President Trump pledges to use "every resource possible' on ICE raids in Democratic cities, including Los Angeles.

Arizona v. United States has been consistently applied for over a decade, but the current administration's methods may not fit the 'spirit' of the decision.

Protesters returned to the streets of downtown Los Angeles Sunday, one day after a nationwide series of demonstrations against President Donald Trump’s illegal immigration policy saw massive crowds in the Civic Center and other cities throughout Southern California and the nation.