Former U.S. President Donald Trump speaks at the George R. Brown Convention Center during the National Rifle Association (NRA) annual convention on May 27, 2022 in Houston, Texas.Brandon Bell/Getty Images Donald Trump headlined a conference for the NRA just 72 hours after the massacre in Uvalde, Texas. The former president offered solutions on school safety, rather than gun control measures. He called out Greg Abbott for not attending the conference in person.