Bill Daley lasted just under a year as Chief of Staff in the White House.
Rahm Emanuel knows why.
"Chief of Staff to the President of the United States is one of the toughest jobs in the country and Bill Daley served President Obama loyally and effectively," Emanuel said in a statement following the announcment that Daley would leave his post.
"Most importantly, he had the President’s back, everyday. That is what you want from a White House Chief of Staff. Now, Bill can leave with his head held high and a job well done."
Daley's departure interrupted buzz that was building for a new book by New York Times journalist Jodi Kantor, The Obamas, that detailed the first couple's relationship in the White House and also spends considerible time on Emanuel's behavior and relationship within the West Wing. It's safe to say he knows a thing or two about how difficult the job can be.
But if history is any guide, quitting the job leads to laudatory speeches. Obama sent both Daley and Emanuel back to Chicago with huge pats on the back.
President Obama called Daley "an outstanding chief of staff during one of the busiest and most consequential years"