 This is a special report from ABC News, the Republican National Convention. I'm Chuck Sievertson. Hours ahead of appearing on opening night in Milwaukee, the now official presidential nominee talked with ABC's Jonathan Karl. I asked Donald Trump if his close call with an assassin's bullet had changed him. I don't like to think about that, he told me, but yes, I think it has had an impact. Trump told me that if he had turned his head, if the bullet had been just a half inch or even a quarter inch closer, he could have been killed.