Senators from both parties claim that the Secret Service made a series of "foreseeable" and "preventable" mistakes that led to a gunman firing shots at Donald Trump in July, killing a rally attendee and grazing Trump's ear. The Secret Service accepted "ultimate responsibility" for failing to prevent the shooting that struck Trump. However, key personnel refused to acknowledge specific failures in planning or security that contributed to the incident. Key errors included miscommunications between snipers, delayed responses to warnings, and technological issues.