A new Government Accountability Office (GAO) report reveals significant security failures by the U.S. Secret Service during the attempted assassination of then-presidential candidate Donald Trump at a campaign rally in Butler, Pennsylvania, one year ago. Commissioned by Senate Judiciary Committee Chairman Chuck Grassley, the report exposes how the Secret Service received classified intelligence about a threat to Trump’s life 10 days before the rally but failed to share it with federal or local law enforcement.

The GAO cited numerous procedural failures, including misallocated resources, poor communication, and inadequate training. The site agent responsible for identifying vulnerabilities was new to the role, and Butler was her first large-scale event. Compounding the lapse, the Secret Service had no formal policy for addressing security concerns raised by a protectee’s staff. A Trump campaign request not to block press cameras with farm equipment may have unintentionally allowed the shooter, 20-year-old Thomas Crooks, a clearer shot.

Crooks, who fatally shot rallygoer Cory Comperatore and injured two others, was killed by counter-snipers. Trump, grazed in the ear, stood and famously urged the crowd to “Fight, fight, fight.” The Biden administration had denied the Trump campaign’s request for enhanced security, including counter-UAS equipment.

Though the Secret Service eventually deployed snipers—likely saving Trump’s life—critical intelligence was never disseminated. In February, several agents were disciplined with suspensions of up to 42 days. Grassley called the failure “the culmination of years of mismanagement,” and praised Trump for surviving to “restore common sense to our country.”