One attendee was killed, two others wounded and a bullet grazed Trump’s ear before a Secret Service counter sniper opened fire on Crooks and killed him. That day jolted an already chaotic race for the White House and solidified Trump’s iconic status in his party and beyond.

Chuck Grassley, who requested the report, said in a statement that what occurred at the rally was the result of “a series of bad decisions and bureaucratic handicaps.”

The agency withstood criticism and a reckoning after a lone assassin grazed Donald J. Trump on the campaign trail. Today, recruiting is up.