US President Donald Trump is sending at least 200 California National Guard members to Oregon after a judge temporarily blocked his administration from deploying that state's troops to Portland.

California Governor Gavin Newsom said on Sunday (local time) he would go to court to fight the deployment to Oregon, where protesters have gathered near a US Immigration and Customs Enforcement (ICE) building in Portland.

"The commander-in-chief is using the US military as a political weapon against American citizens,"

Mr Newsom said.

"We will take this fight to court, but the public cannot stay silent in the face of such reckless and authoritarian conduct by the president of the United States."

A Pentagon spokesperson said "at the direction of the president", the guards were being reassigned

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