From a Wall Street Journal profile of Michelle Obama:
At home, she expects a lot of every family member, from having her 6- and 9-year-old daughters set their own alarm clocks to insisting her husband pick up his dirty socks. Her most recent directive to him: Stop smoking.
On the campaign trail, she has emerged as an influential adviser whom aides watch as a barometer for how both they and the candidate are doing. They watch for "the look" between her and Mr. Obama, on stage or in private moments, as an indication of his mood.
Inside the campaign, she's been dubbed "the closer" because she often pushes harder to seal the deal with voters than he does. But worries about her sarcastic humor being taken the wrong way have forced her to cut back some of her public candor, she admits.
...The Obamas present themselves as equals. "We're two well-versed lawyers who know each other really well," Mrs. Obama says in an interview. "We each think we're right about everything, and can argue each other into a corner." Friends and campaign aides describe them as a high-powered team built on contrasts: She's the heart to his head, the enforcer to his lapses, regimented to his laid-back, critic to his ego, details to his broad strokes, sarcasm to his sincerity, toughness to his cool vibe