The National Guard has been deployed to enforce the law before. What's different now?

NPR
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Members of the National Guard patrol on the National Mall near the U.S. Capitol in Washington, D.C., on Wednesday.

The National Guard has been deployed many times historically. Experts say the president's decision to deploy the Guard as a blanket response to crime in D.C. is a departure from its intended mission.

(Image credit: Saul Loeb)

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