David Chipman, a gun-control advocate, is heading for a full Senate vote.WASHINGTON (CN) — Lawmakers advanced President Joe Biden’s pick to oversee the Bureau of Alcohol, Tobacco, Firearms and Explosives to the full Senate for a confirmation vote, but not without a contentious debate on the floor Thursday.David Chipman, an outspoken gun-control advocate and an ATF veteran himself, was tapped to oversee the department in April. Before his nomination, he worked as a senior policy advisor at Giffords Law Center, a gun-violence prevention group founded by its namesake, former Congresswoman Gabby Giffords, who was shot in the head during an...