 This is his first rally since the assassination attempt. The Secret Service and its director, Kimberly Chiedler, are under intense scrutiny after the assassination attempt on former President Trump. Lawmakers and others across the political spectrum question how a gunman could have gotten so close to the candidate during a rally in Pennsylvania last weekend. Chiedler has talked about how the Secret Service has a zero-fail mission. She's facing calls to resign and will testify on Capitol Hill Monday.