Don't worry, the same people who enforce the emoluments clause, violations of supreme court rulings and corruption in the presidency will totally enforce this in the same way.
Congress hasn't declared war since WWII. The 1973 War Powers Resolution gives POTUS the ability to use the military for up to 60 days but he must notify congress. This is what Obama used to fake action in Lybia.
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I've hated this bullshit excuse ever since Bush got permission to use it.