TrumpPresident Donald Trump has said he would invoke the powerful Insurrection Act, if he deems it necessary, in Portland. (AP Photo/Evan Vucci)(AP Photo/Evan Vucci)

Experts steeped in the intricacies of national security law say President Donald Trump will likely prevail in his attempt to send troops to Portland, even if he loses his appeal of a federal judge’s ruling that temporarily barred him from taking that action.

That’s because Trump has a much more potent tool in his arsenal: The more than two-centuries-old Insurrection Act.

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