GOP lawmaker who used to be sniper says security failure led to shooting

Republican representative and former sniper Cory Mills identifies security failures at former President Donald Trump's rally in Butler, Pennsylvania that led to Saturday evening's shooting. #CNN #News Want to stay up to date on the day’s top stories? Sign up for CNN’s 5 Things newsletter, and we’ll give you the 5 biggest stories you need to know, videos people are watching, and more! Sign up here: https://www.cnn.com/newsletters/5-things?source=nl-acq_social_youtubedesc&utm_source=nl-acq_social_youtubedesc