Calling it a “bittersweet day at the White House,” President Obama announced that chief of staff Rahm Emanuel was stepping down, and would be replaced by senoir advisor Pete Rouse on an interim basis.

The press announcement was triumphant, with Emanuel and Obama crediting each other for saving America from the second Great Depression.

It was also a de facto announcement of Emanuel’s candidacy to be mayor of Chicago. Without mentioning the post by name, Obama said Emanuel was “extraordinarily well qualified” for it. Emanuel himself said he was looking forward to going back to Chicago and was “energized by the prospect of new challenges.”

Obama also mentioned that Rouse’s low-key demenor represents a stark contrast from Emanuel’s legendary brash style. Obama said Rouse “has never seen TV camera or microphone that he likes.”