 A campaign official telling ABC News that it'll be a forceful and needed address updating on the attack on Donald Trump. The chief executive earlier today at the White House on some Republicans accusing him of inciting the shooting. I urge everyone, everyone please, don't make assumptions about his motives or his affiliations. Sources say so far the shooter, Thomas Crooks, who was 20, had no known affiliations and seems like a lone wolf. ABC's Aaron Katursky. Ah!