Mayor Richard Daley said today that Rahm's ambition to be mayor is "a good thing."
Speaking at the kickoff for a major biotechnology convention coming to McCormick Place, Daley seemed charitable to the prospect of Emanuel one day taking over on five.
Daley's good humor stands in stark contrast to his rumored poor mood earlier this week after Emanuel dropped his announcement -- apparently an unplanned surprise -- on Charlie Rose.
Rahm's announcement took several Chicago politicians aback, including Attorney General Lisa Madigan ("a little premature"), Gov. Quinn ("I thought the world was enough for him"), and Rep. Luis Gutierrez ("better stay in the White House").
Cook County Commissioner John Daley, the mayor's brother, added that Rahm wouldn't be the automatic front-runner for the job.
"Chicago is a great city," Daley said today. "A lot of people would like to be the mayor of a great city like Chicago."