Police and Federal officers stand guard an area by the U.S. Immigration and Customs Enforcement facility in Portland, Ore. (AP)

The state of Illinois and the city of Chicago filed a lawsuit on Monday to stop US President Donald Trump’s administration from deploying hundreds of National Guard troops to the city.

The lawsuit came just as the troops were preparing to move in, hours after a federal judge temporarily blocked a similar deployment to Portland, Oregon.

Illinois Governor JB Pritzker said about 300 Illinois National Guard troops were to be federalised and sent to Chicago, along with 400 others from Texas. The lawsuit called Trump’s plan “unlawful and dangerous” and accused him of targeting cities that oppose him politically.

“The American people, regardless of where they reside,

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