Early this month, Barack Obama was meeting with the House speaker, Nancy Pelosi, and other lawmakers when Rahm Emanuel, his chief of staff, began nervously cracking a knuckle.
Mr. Obama then turned to complain to Mr. Emanuel about his noisy habit.
At which point, Mr. Emanuel held the offending knuckle up to Mr. Obama’s left ear and, like an annoying little brother, snapped off a few special cracks.
The episode, confirmed by Mr. Emanuel’s office, underscores some essential truths about Mr. Emanuel: He is brash, has a deep comfort level with his new boss, and has been ever-present at Mr. Obama’s side of late, in meetings, on podiums and in photographs