Law enforcement officials investigating the assassination attempt on Donald Trump told lawmakers Wednesday that 20 minutes passed between the time U.S. Secret Service snipers first spotted the gunman on a rooftop and the time shots were fired at the former president, according to several law enforcement officials and lawmakers briefed on the matter. Officials said the snipers spotted the suspect, 20-year-old Thomas Matthew Crooks, on the roof of a building outside the security zone at the rally in Butler, Pennsylvania, at 5:52 p.m. ET. The shooting happened at 6:12 p.m. ET, 20 minutes later, the sources said. In the days...