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Julián Castro on arming teachers with guns: 'Teachers should be teaching, not serving as a security guard'

03:06

Former HUD Secretary and 2020 Democratic presidential candidate Julián Castro discusses "the good guy with a gun" and arming teachers at the #GunSafetyForum2020, telling Craig Melvin that arming teachers is one of the "worst ideas to come out of different states, including Texas."