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.

What the judge rules, and the likely appeals that follow, may alter decades of understanding about the roles of governors and the White House in quelling domestic unrest.

Gov. Gavin Newsom (D-CA) will address Californians at 9:30 p.m. Tuesday as the standoff between the governor and the Trump administration over the Los Angeles riots continues to simmer. Newsom announced the address Tuesday evening,