Americans’ approval of the National Rifle Association has steadily declined since their tone-deaf response to the Sandy Hook Elementary School massacre in December. The gun lobbying group now has a negative favorability rating, down 10 points since the week before CEO Wayne LaPierre’s press conference, during which he called for more guns in schools and blamed media glorification of violence. Just 42 percent of respondents approved of the NRA, while 45 percent now view it unfavorably, according to a new survey by Public Policy Polling. Fifty percent of the public also rejected the NRA’s proposal for more guns in schools, and 64 percent oppose another idea to arm teachers. Gun owners also oppose arming teachers. Only a narrow margin of Republicans support the push for more guns in school, with 39 percent against.