FILE - In this Dec. 17, 2012, file photo New York City Mayor Michael Bloomberg, second from left, watches a video testimonial surrounded by shooting survivors and victims' relatives during a news conference at New York's City Hall. The week after the Sandy Hook Elementary School shooting massacre in Newtown, Conn., Bloomberg and dozens of shooting survivors and victims' relatives were calling on Congress to tighten gun laws and enforcement. After 12 years in office, Bloomberg has vowed to never seek office again but will fund pet causes like gun control. (AP Photo/Seth Wenig, File)