Make no mistake about it, the Obama’s ties to Chicago are tight. The First Lady’s camp just announced that Mrs. Obama’s former Chief of Staff Jackie Norris is stepping down to become senior adviser to the Corporation for National and Community Service. In her place will be Chi-Town’s Susan Sher, a longtime buddy of the First Lady who has been promoted as her new chief of staff. Sher has already worked in both the East and West Wings of the White House. She also worked with Mrs. O at the City of Chicago and later at the University of Chicago.