The Alabama based National Association of School Resource Officers is being pressured to withdraw an invitation for U.S. Attorney General Jeff Sessions to speak. A coalition of progressives in Nevada upset with the Trump administration's immigration policy is urging the group to rethink having Sessions speak at a school safety conference in Reno next week. Leaders of more than a dozen labor unions, women's, religious and minority groups sent a letter Thursday asking the association to rescind its invitation to Sessions because of the administration's stand on immigration. Critics say rolling out the welcome mat to Sessions would demonstrate complicity with his support for the "zero tolerance" policy of separating migrant parents and children at the U.S. border. The Alabama-based association had no immediate comment.