The White House announced Wednesday that President Biden will nominate longtime Giffords policy advisor and former ATF agent David Chipman to lead the nation's gun regulatory agency. Chipman, whose bio submitted to Congress in relation to his role in testifying in support of recent gun control measures, details that he has been with Giffords since 2016, having come to that anti-gun group after previously working for Bloomberg-founded Mayors Against Illegal Guns. Prior to that, he was with the ATF from 1988 to 2012, including running the agency's Asset Forfeiture Program, leading the Detroit Field Division, and serving as "Case agent...