Zero Fail: The Rise and Fall of the Secret Service by Carol Leonnig:
A day later, the White House announced that Pierson had resigned, something she was forced to do that morning, and that she would be replaced by Clancy. Many in the public rightly assumed she got canned for having one too many bad things happen on her watch, but wrongly assumed she’d tried to hide something from the president.
Johnson knew better. He knew that a series of Secret Service deputies had failed Pierson and that some had actively worked against her to leak bad news. On the day of her resignation, he told his staff to take him to Secret Service headquarters and order all the assistant directors to meet him in the main conference room, where he proceeded to give them a tongue-lashing.
“Today is rock bottom and every day after this we are going up,” Johnson said. “She took the fall for all of you. But you all bear the responsibility. You better get your asses in gear or you’re out. Now one of you, go ahead and leak this, since you leak everything else.”
They hung their heads and watched Johnson walk out.