From CNN.

Congress hasn’t officially declared war since World War II, but presidents have used a string of legal loopholes for military action without going to Congress.

CNN Chief Domestic Correspondent Phil Mattingly explains.

0:00 History of US war authorization
1:00 Who has the power to send US troops to war?
2:11 The War Powers Resolution of 1973
3:07 Presidential loopholes to mobilizing US troops

Watch more news explainers on CNN All Access: https://cnn.it/4qA8ez3

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