The White House said Monday that President Obama believes a ban on bullets commonly used with the AR-15 rifle will save police officers’ lives. “We are looking at additional ways to protect our brave men and women in law enforcement, and believe that this process is valuable for that reason alone,” said White House press secretary Josh Earnest. The Bureau of Alcohol, Tobacco, Firearms and Explosives is accepting public comment on an administration proposal to ban .223 M855 “green tip” ammunition most often used with AR-15 rifles. House lawmakers from both parties, as well as sportsmen and some law enforcement...