 is influenced by the last person chirping in his ear. So we were hearing even about an hour before that it could be somebody else other than him. But I think he does view it as a future of the Republican Party, a continuation, if you will, of Trump's policies. Tonight, former GOP candidate Nikki Haley expected to be a keynote speaker at the RNC. We're learning more about the gunman, Thomas Crooks, who fired shots injuring Trump and killing a bystander Saturday. Investigators, though, say they still don't know why. ABC's Erin Katursky explains.