President Donald Trump has sent federalised troops from California to Oregon after a court denied his attempt to deploy the National Guard in Portland, BBC reported.

The deployment circumvents a judge's order that blocked deploying troops in Portland by instead using National Guard members who were already serving in Los Angeles after summer protests there.

California Gov Gavin Newsom vowed to file a lawsuit over the manoeuvre, which he called a "breathtaking abuse of the law and power".

Portland is the latest US city - many of which are Democrat-led - targeted as part of the president's crime crackdown. He has argued troops are necessary to restore peace amid ongoing protests over immigration enforcement, according to BBC.