U.S. President Donald Trump can keep his deployment of National Guard troops in Los Angeles, according to a court ruling, as protests against immigration raids look set to enter their second week in the strongest backlash since his return to power in January.

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.

The disagreement between President Donald Trump and California Gov. Gavin Newsom over Trump deploying state National Guard troops to Los Angeles is now being debated in court. We’ll explain how the situation developed and answer some common questions.