U.S. first lady Michelle Obama waves to employees after delivering remarks at the Department of Housing and Urban Development in Washington, February 4, 2009. REUTERS/Jim Young (UNITED STATES)

U.S. President elect Barack Obama and Michelle Obama get their daughters Sasha (L) and Malia (second from left) ready for their first day of school at Sidwell Friends in Washington January 5, 2009. The Obama family is staying at the Hay Adams Hotel in Washington until they move to Blair House, and then to the White House on January 20, 2009. REUTERS/Callie Shell/Obama Transition Office/Handout (UNITED STATES)

U.S. President elect Barack Obama readies daughter Sasha (L) for her first day of school at Sidwell Friends in Washington January 5, 2009. The Obama family is staying at the Hay Adams Hotel in Washington until they move to Blair House, and then to the White House on January 20, 2009. REUTERS/Callie Shell/Obama Transition Office/Handout (UNITED STATES)

U.S. President-elect Barack Obama (R) steps up to the podium in front of Robert Rubin (L), Chairman of Citigroup, Vice President-elect Joe Biden (2nd L) and Jennifer Granholm (2nd R), Governor of Michigan, for his first press conference following his election victory in Chicago, November 7, 2008. REUTERS/Carlos Barria (UNITED STATES)