The United States hasn't officially declared war against another country since World War II, and yet, we've been in dozens of conflicts since then. So what does it mean to "declare war," and how has the definition of war, and how the United States engages in it, changed since our framers wrote the Constitution? 

Albin Kowalewski, a historical publication specialist at the U.S. House of Representatives, helps us answer these questions. He spoke with our former host, Virginia Prescott, in 2017.

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