California Governor Gavin Newsom accused President Donald Trump of misusing his power by mobilizing troops in Los Angeles and warned other states to prepare for similar unrest, as protests over immigration raids stretched into a fifth night and led to a curfew in parts of the city’s downtown.

California Gov. Newsom has depicted the federal military intervention in the nation's second largest city as the onset of a much broader effort by Trump to overturn political and cultural norms at th...