Lawyers for Mayor Bloomberg are asking a judge to ban any reference to the Second Amendment during the upcoming trial of a gun shop owner who was sued by the city. While trials are often tightly choreographed, with lawyers routinely instructed to not tell certain facts to a jury, a gag order on a section of the Constitution would be an oddity. “Apparently Mayor Bloomberg has a problem with both the First and the Second amendments,” Lawrence Keane, the general counsel of a firearms industry association, the National Shooting Sports Foundation, said. The trial, set to begin May 27, involves...