For weeks, Michelle Obama had been telling her staff and closest confidantes that she wasn't having the impact she wanted. She is a woman of substance, with a background in law, public policy and management, who found herself relegated to role model in chief. The West Wing of the White House -- the fulcrum of power and policy -- had not fully integrated her into its agenda. She wanted more. So, earlier this month, she changed her chief of staff, and now she's changing her role.
