A “cascade” of failures allowed a gunman to shoot at Donald Trump during a campaign rally in 2024, a report into the attempted assassination has found.

The Senate report, released a year after a 20-year-old gunman opened fire on Mr Trump in Butler, Pennsylvania, accused the Secret Service of a pattern of negligence and communication breakdowns in the planning and execution of the rally.

“This was not a single error. It was a cascade of preventable failures that nearly cost President Trump his life,” the Senate homeland security and governmental affairs committee report said.

The Secret Service is charged with protecting current and former presidents and their families, as well as visiting foreign leaders and some other senior officials.