CHICAGO - FEBRUARY 11:  Michelle Obama, the wife of  Senator Barack Obama (D-IL), listens as the Senator addresses a crowd gathered for a campaign rally at the University of Illinois at Chicago February 11, 2007 in Chicago, Illinois. Obama returned to Illinois after a two-day campaign swing through Iowa after announcing February 10, that he would seek the Democratic nomination for President. Getty Images logo Getty Images 64 months ago

CHICAGO - FEBRUARY 11: Michelle Obama, the wife of Senator Barack Obama (D-IL), listens as the Senator addresses a crowd gathered for a campaign rally at the University of Illinois at Chicago February 11, 2007 in Chicago, Illinois. Obama returned to Illinois after a two-day campaign swing through Iowa after announcing February 10, that he would seek the Democratic nomination for President.