>>> this sunday. the debate over guns in america. is this time different? after emotional pleas from survivors and family members who lost loved ones. >> we need the change. >> should have been one school shooting and we should have fixed it. >> how have we not stopped this after columbine, after sandy hook. >> president trump signals he is open to change. >> we're going to do a lot, but we're going to be strong on background checks. >> some big name republicans break with the nra as the list of companies cutting ties with the gun lobby grows. >> stand and unflinchingly defend the second amendment. >> and the president pushes a controversial plan to arm some teachers. >> we have to harden our schools, not soften them up. >> i disagree with arming