 David McCormick said he was about to be introduced on stage as the Republican candidate running for U.S. Senate in Pennsylvania when the popping noises broke out. There was a swarm of Secret Service officers that knocked down President Trump and got on top of him. Mr. Trump was taken to a local hospital. The Trump team says he's okay. In the crowd, one person killed, two others critically injured. Overnight, the FBI identifying 20-year-old Matthew Crooks of Bethel Park, Pennsylvania, as the shooter apparently killed at the scene.