 Authorities also found bomb-related items inside the car of 20-year-old Thomas Matthew Crooks. He was shot and killed by the Secret Service after he fired on the former president during a campaign rally in Butler, Pennsylvania. Trump was grazed. Two spectators at the rally critically injured. Another man killed. Political analyst Larry Sabato says political violence is out of control. More and more people who think they have the right to threaten violence because they disagree with somebody's politics.