Chicago Police Superintendent Larry Snelling speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Deputy Special Agent in Charge Derek Mayer speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Illinois Gov. JB Pritzker, right, greets Chicago Mayor Brandon Johnson during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Illinois Gov. JB Pritzker speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
2024 Democratic National Convention Coordinator Jeff Burnside speaks during a security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Chicago Police Superintendent Larry Snelling speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Emergency Management and Communications Executive Director Jose Tirado speaks during a security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Deputy Special Agent in Charge Derek Mayer speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Chicago Mayor Brandon Johnson speaks during a Democratic National Convention security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
2024 Democratic National Convention Coordinator Jeff Burnside speaks during a security briefing at the U.S. Secret Service's Chicago Field Office Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
FBI Acting Special Agent in Charge Lucas Rothaar speaks during a security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
Emergency Management and Communications Executive Director Jose Tirado speaks during a security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)
FBI Acting Special Agent in Charge Lucas Rothaar speaks during a security briefing at the U.S. Secret Service's Chicago Field Office, Thursday, July 25, 2024, in Chicago. (AP Photo/Erin Hooley)