Did Daley and Emanuel plan Emanuel's succession?

With White House Chief of Staff Rahm Emanuel on the verge of making a decision about whether or not to leave the White House and make a run for the open mayoral position in Chicago, one has to wonder. One has to wonder if Emanuel knew something about the eventual Daley resignation a year in advance.

Rumors floated a year ago that Emanuel would be leaving the White House to run in the Chicago elections for mayor. At that time, Mayor Daley had not said anything to anybody about any plans to resign. He was mayor of Chicago, and it is unlikely anybody would have unseated him. And a fellow Democrat would never run against a sitting mayor fro the same party.

Yet rumors about Emanuel eventually running were taken seriously.

Now, everyone has come to terms with Mayor Daley's recent announcement that he will not be running for re-election, and after the initial scuffle of announcements of candidates, Emanuel is back in the news about to make his decision..Was this all planned in advance over a year ago, setting Rahm Emanuel up as Daley's eventual successor?