An escalating clash pits a Republican president looking to fulfill his mass deportation goals against a Democratic governor with White House aspirations hoping to mobilize opposition.

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.

White House press secretary Karoline Leavitt said President Trump called in the National Guard with the expectation that it would 'hopefully prevent and deter some of this violence.'