Chicago Mayor Emanuel

Chicago Mayor Emanuel
FILE - In this April 27, 2010 file photo, White House Chief of Staff Rahm Emanuel laughs as he takes some good natured ribbing about his recent comment about someday wanting to be mayor of Chicago while participating in the sixth annual Richard J. Daley Global Cities Forum in Chicago. Daley, 68, who has presided over the nation's third-largest city for 21 years, like his father did before him, announced Tuesday, Sept. 7, 2010, that he will not run for a seventh term. Emanuel said in April during a television interview that "it's no secret" he'd like to run for mayor of Chicago someday. (AP Photo/M. Spencer Green, File)