CHICAGO (WLS) -- For weeks, President Donald Trump has threatened to send the National Guard to Chicago. He is now doing it, and is considering using a law enacted more than two centuries ago to legally justify the deployment.

Troops from Texas have arrived. For now, they are gearing up at a U.S. Army Reserve facility in Elwood. While their exact mission is unclear, what is clear is that Gov. JB Pritzker does not want the guard in his state. He is taking legal action to prevent it. So, President Trump may invoke the Insurrection Act if a federal court prevents him from deploying the Guard.

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"That is an act that was passed by Congress in 1807, back in colonial days, when there was a concern about possible insurrections among, within

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